Weight the automatic-qualification path, the form/performance driver, the captain's-pick path, and the availability gate, then blend into a single probability anchored on the low historical base rate of first-year PGA Tour pros making the U.S. Presidents Cup team, adjusted upward for Koivun's exceptional early results and any evidence of standings position or captain interest.
## Cross-Market Signals ### No signal found
1. [sq2 | article_search | STRONG cred 95 | UP | RECENT] Jackson Koivun won the 3M Open on July 26, 2026 by three strokes in only his third professional start, beating Scottie Scheffler. 2. [sq2 | article_search | MODERATE cred 92 | UP | RECENT] Koivun shot 61 in round three and went bogey-free on the weekend for a tournament-record 25-under total. 3. [sq1 | article_search | STRONG cred 88 | DOWN | RECENT] Koivun turned pro only after leading Auburn to the NCAA championship in June 2026, giving him roughly three pro starts before August qualifying closes. 4. [sq1 | wikipedia_lookup | MODERATE cred 70 | DOWN | DATED] U.S. Presidents Cup automatic qualifying uses points accumulated over multiple seasons, a system that structurally disadvantages a player with only weeks of pro results. 5. [sq3 | article_search | MODERATE cred 72 | UP | RECENT] CBS Sports published a piece headlined that rookie Koivun 'made the U.S. Presidents Cup selections a bit more difficult,' indicating he is in captain's-pick conversation. 6. [sq3 | code_execution | WEAK cred 40 | NEUTRAL | VERY_RECENT] Modeled base rate for a first-year PGA Tour pro occupying any given U.S. Presidents Cup slot is roughly 1%, with scenario-weighted estimates for Koivun in the 10-21% range. 7. [sq4 | article_search | STRONG cred 85 | UP | RECENT] A PGA Tour victory confers multi-year exempt status, so Koivun's 3M Open win secures full Tour membership and eligibility. 8. [sq4 | wikipedia_lookup | MODERATE cred 90 | UP | DATED] Koivun reached No. 1 in the World Amateur Golf Ranking in June 2025 and swept all four major collegiate awards as a freshman in 2024. 9. [sq1 | wikipedia_lookup | STRONG cred 95 | NEUTRAL | DATED] The 2026 Presidents Cup is scheduled for September 24-27 at Medinah Country Club, with qualifying closing in August 2026. 10. [sq2 | article_search | WEAK cred 35 | NEUTRAL | VERY_RECENT] No reporting was found of additional Koivun top-5 finishes beyond the 3M Open win as of mid-August 2026. 11. [sq3 | article_search | WEAK cred 30 | NEUTRAL | VERY_RECENT] No article in the research set confirms Brandt Snedeker's captaincy or any public statement of his about Koivun. 12. [sq1 | article_search | WEAK cred 60 | NEUTRAL | VERY_RECENT] The article search returned mostly irrelevant results (Michael Jackson, World Cup, politics), indicating thin golf-specific coverage in this dataset. ## Cross-Market Signals ### No signal found Information gaps: - Current U.S. Presidents Cup points standings position for Koivun - Koivun's OWGR ranking after the 3M Open win - Historical base rate: rookies/first-year pros receiving Presidents Cup captain's picks - Captain Snedeker's public comments and pick criteria; team announcement date Key uncertainties: - Whether one win generates enough points for top-6 auto qualification - Koivun's results in remaining events before August qualifying close - Depth of competing American candidates for six captain's picks - Whether captain favors experience over rookie form
You are an elite superforecaster using Tetlock-style Fermi decomposition. Estimate each sub-question INDEPENDENTLY, then provide a holistic estimate. The pipeline will mathematically recombine the sub-question estimates — your job is to give the most accurate per-component probabilities.
## Question
Will 21 year-old Jackson Koivun be named to the United States team for the 2026 Presidents Cup?
## Description / Resolution Criteria
## Description
CBS Sports: [Why PGA Tour rookie Jackson Koivun made the U.S. Presidents Cup selections a bit more difficult](https://www.cbssports.com/golf/news/u-s-presidents-cup-team-jackson-koivun-roster/)
`{"format": "bot_tournament_question", "info": {"hash_id": "672cf1f33e488918", "sheet_id": "161"}}`
## Resolution Criteria
This question resolves as **Yes** if Jackson Koivun is selected to play in the 2026 [Presidents Cup](https://en.wikipedia.org/wiki/List_of_American_Presidents_Cup_golfers) to represent the American team.
## Sub-question decomposition
- (w=0.25) Will Jackson Koivun finish inside the top 6 of the U.S. Presidents Cup automatic qualifying standings when qualifying closes in August 2026? — Automatic qualification is the cleanest path to selection and requires elite, sustained 2026 results (wins/majors).
- (w=0.30) Will Koivun win a PGA Tour event or record at least three top-5 finishes between now and the end of Presidents Cup qualifying in August 2026? — Form is the dominant driver of both automatic qualification and captain's-pick consideration; a win essentially puts him
- (w=0.35) Conditional on not auto-qualifying, will U.S. captain Brandt Snedeker use one of the six captain's picks on Koivun? — Most likely path; depends on standings position, captain's stated preferences for veterans vs. rookies, and team-room fi
- (w=0.10) Will Koivun remain healthy, retain full PGA Tour status, and be inside the OWGR top 40 in August 2026? — Baseline eligibility/availability gate — injury or a slump in his rookie season would eliminate any chance.
Combination rule: **weighted_average**
## Synthesized evidence
1. [sq2 | article_search | STRONG cred 95 | UP | RECENT] Jackson Koivun won the 3M Open on July 26, 2026 by three strokes in only his third professional start, beating Scottie Scheffler.
2. [sq2 | article_search | MODERATE cred 92 | UP | RECENT] Koivun shot 61 in round three and went bogey-free on the weekend for a tournament-record 25-under total.
3. [sq1 | article_search | STRONG cred 88 | DOWN | RECENT] Koivun turned pro only after leading Auburn to the NCAA championship in June 2026, giving him roughly three pro starts before August qualifying closes.
4. [sq1 | wikipedia_lookup | MODERATE cred 70 | DOWN | DATED] U.S. Presidents Cup automatic qualifying uses points accumulated over multiple seasons, a system that structurally disadvantages a player with only weeks of pro results.
5. [sq3 | article_search | MODERATE cred 72 | UP | RECENT] CBS Sports published a piece headlined that rookie Koivun 'made the U.S. Presidents Cup selections a bit more difficult,' indicating he is in captain's-pick conversation.
6. [sq3 | code_execution | WEAK cred 40 | NEUTRAL | VERY_RECENT] Modeled base rate for a first-year PGA Tour pro occupying any given U.S. Presidents Cup slot is roughly 1%, with scenario-weighted estimates for Koivun in the 10-21% range.
7. [sq4 | article_search | STRONG cred 85 | UP | RECENT] A PGA Tour victory confers multi-year exempt status, so Koivun's 3M Open win secures full Tour membership and eligibility.
8. [sq4 | wikipedia_lookup | MODERATE cred 90 | UP | DATED] Koivun reached No. 1 in the World Amateur Golf Ranking in June 2025 and swept all four major collegiate awards as a freshman in 2024.
9. [sq1 | wikipedia_lookup | STRONG cred 95 | NEUTRAL | DATED] The 2026 Presidents Cup is scheduled for September 24-27 at Medinah Country Club, with qualifying closing in August 2026.
10. [sq2 | article_search | WEAK cred 35 | NEUTRAL | VERY_RECENT] No reporting was found of additional Koivun top-5 finishes beyond the 3M Open win as of mid-August 2026.
11. [sq3 | article_search | WEAK cred 30 | NEUTRAL | VERY_RECENT] No article in the research set confirms Brandt Snedeker's captaincy or any public statement of his about Koivun.
12. [sq1 | article_search | WEAK cred 60 | NEUTRAL | VERY_RECENT] The article search returned mostly irrelevant results (Michael Jackson, World Cup, politics), indicating thin golf-specific coverage in this dataset.
## Cross-Market Signals
### No signal found
Information gaps:
- Current U.S. Presidents Cup points standings position for Koivun
- Koivun's OWGR ranking after the 3M Open win
- Historical base rate: rookies/first-year pros receiving Presidents Cup captain's picks
- Captain Snedeker's public comments and pick criteria; team announcement date
Key uncertainties:
- Whether one win generates enough points for top-6 auto qualification
- Koivun's results in remaining events before August qualifying close
- Depth of competing American candidates for six captain's picks
- Whether captain favors experience over rookie form
## Required pre-forecast walkthrough
Before giving probabilities, walk through these explicitly:
(a) The time left until the question resolves.
(b) The status quo outcome — what happens if nothing changes from today.
(c) A brief scenario that results in NO.
(d) A brief scenario that results in YES.
## Calibration guidance
- **Estimate each sub-question in isolation.** Do not let your answer to one sub-question anchor your answer to another. This is the core of Fermi decomposition — independence forces more careful reasoning per factor.
- **Anchor on the status quo.** Require strong specific evidence to move far from it.
- 0.05 / 0.95 require strong, multi-source evidence. Avoid >0.97 or <0.03 unless the outcome is already settled or near-tautological — overconfident misses are punished heavily by the log score.
- **Anchor on prediction markets.** If liquid market prices (Polymarket / Kalshi) or a community forecast appear in the evidence, treat them as a strong, well-calibrated prior. Your final estimate should rarely sit more than ~15 percentage points from a liquid market on the SAME question — move further only with specific evidence the market lacks.
- **Treat research as fallible, not ground truth.** A single-source or "very recent" claim — especially one the evidence flags as unverified, possibly AI-generated, or low-credibility — must not drive you to near-certainty. When a load-bearing fact is unverified, keep at least 10-15% on the chance it is wrong.
- **Also provide a holistic estimate** — your overall gut feeling about the main question, BEFORE you see the mathematical combination. This serves as a sanity check: if the Fermi result and holistic estimate diverge wildly, something is wrong.
## Output
Return ONLY valid JSON, no markdown fences:
{
"rationale": "<address (a) (b) (c) (d) above — 5-8 sentences total>",
"sub_question_estimates": {
"sq1": <float in [0.01, 0.99]>,
"sq2": <float in [0.01, 0.99]>,
"sq3": <float in [0.01, 0.99]>,
"sq4": <float in [0.01, 0.99]>
},
"holistic_p_yes": <float in [0.01, 0.99] — your overall estimate ignoring the decomposition>,
"what_would_change_my_mind": "<1-2 sentences: what new info would push you above 70% or below 30%>"
}
{
"forecast": {
"combination_logic": "weighted_average",
"evidence_brief": "1. [sq2 | article_search | STRONG cred 95 | UP | RECENT] Jackson Koivun won the 3M Open on July 26, 2026 by three strokes in only his third professional start, beating Scottie Scheffler.\n2. [sq2 | article_search | MODERATE cred 92 | UP | RECENT] Koivun shot 61 in round three and went bogey-free on the weekend for a tournament-record 25-under total.\n3. [sq1 | article_search | STRONG cred 88 | DOWN | RECENT] Koivun turned pro only after leading Auburn to the NCAA championship in June 2026, giving him roughly three pro starts before August qualifying closes.\n4. [sq1 | wikipedia_lookup | MODERATE cred 70 | DOWN | DATED] U.S. Presidents Cup automatic qualifying uses points accumulated over multiple seasons, a system that structurally disadvantages a player with only weeks of pro results.\n5. [sq3 | article_search | MODERATE cred 72 | UP | RECENT] CBS Sports published a piece headlined that rookie Koivun \u0027made the U.S. Presidents Cup selections a bit more difficult,\u0027 indicating he is in captain\u0027s-pick conversation.\n6. [sq3 | code_execution | WEAK cred 40 | NEUTRAL | VERY_RECENT] Modeled base rate for a first-year PGA Tour pro occupying any given U.S. Presidents Cup slot is roughly 1%, with scenario-weighted estimates for Koivun in the 10-21% range.\n7. [sq4 | article_search | STRONG cred 85 | UP | RECENT] A PGA Tour victory confers multi-year exempt status, so Koivun\u0027s 3M Open win secures full Tour membership and eligibility.\n8. [sq4 | wikipedia_lookup | MODERATE cred 90 | UP | DATED] Koivun reached No. 1 in the World Amateur Golf Ranking in June 2025 and swept all four major collegiate awards as a freshman in 2024.\n9. [sq1 | wikipedia_lookup | STRONG cred 95 | NEUTRAL | DATED] The 2026 Presidents Cup is scheduled for September 24-27 at Medinah Country Club, with qualifying closing in August 2026.\n10. [sq2 | article_search | WEAK cred 35 | NEUTRAL | VERY_RECENT] No reporting was found of additional Koivun top-5 finishes beyond the 3M Open win as of mid-August 2026.\n11. [sq3 | article_search | WEAK cred 30 | NEUTRAL | VERY_RECENT] No article in the research set confirms Brandt Snedeker\u0027s captaincy or any public statement of his about Koivun.\n12. [sq1 | article_search | WEAK cred 60 | NEUTRAL | VERY_RECENT] The article search returned mostly irrelevant results (Michael Jackson, World Cup, politics), indicating thin golf-specific coverage in this dataset.\n\n## Cross-Market Signals\n\n### No signal found\n\nInformation gaps:\n - Current U.S. Presidents Cup points standings position for Koivun\n - Koivun\u0027s OWGR ranking after the 3M Open win\n - Historical base rate: rookies/first-year pros receiving Presidents Cup captain\u0027s picks\n - Captain Snedeker\u0027s public comments and pick criteria; team announcement date\n\nKey uncertainties:\n - Whether one win generates enough points for top-6 auto qualification\n - Koivun\u0027s results in remaining events before August qualifying close\n - Depth of competing American candidates for six captain\u0027s picks\n - Whether captain favors experience over rookie form",
"forecast_prompt": "You are an elite superforecaster using Tetlock-style Fermi decomposition. Estimate each sub-question INDEPENDENTLY, then provide a holistic estimate. The pipeline will mathematically recombine the sub-question estimates \u2014 your job is to give the most accurate per-component probabilities.\n\n## Question\nWill 21 year-old Jackson Koivun be named to the United States team for the 2026 Presidents Cup?\n\n## Description / Resolution Criteria\n## Description\nCBS Sports: [Why PGA Tour rookie Jackson Koivun made the U.S. Presidents Cup selections a bit more difficult](https://www.cbssports.com/golf/news/u-s-presidents-cup-team-jackson-koivun-roster/)\n\n`{\"format\": \"bot_tournament_question\", \"info\": {\"hash_id\": \"672cf1f33e488918\", \"sheet_id\": \"161\"}}`\n\n## Resolution Criteria\nThis question resolves as **Yes** if Jackson Koivun is selected to play in the 2026 [Presidents Cup](https://en.wikipedia.org/wiki/List_of_American_Presidents_Cup_golfers) to represent the American team.\n\n## Sub-question decomposition\n- (w=0.25) Will Jackson Koivun finish inside the top 6 of the U.S. Presidents Cup automatic qualifying standings when qualifying closes in August 2026? \u2014 Automatic qualification is the cleanest path to selection and requires elite, sustained 2026 results (wins/majors).\n- (w=0.30) Will Koivun win a PGA Tour event or record at least three top-5 finishes between now and the end of Presidents Cup qualifying in August 2026? \u2014 Form is the dominant driver of both automatic qualification and captain\u0027s-pick consideration; a win essentially puts him\n- (w=0.35) Conditional on not auto-qualifying, will U.S. captain Brandt Snedeker use one of the six captain\u0027s picks on Koivun? \u2014 Most likely path; depends on standings position, captain\u0027s stated preferences for veterans vs. rookies, and team-room fi\n- (w=0.10) Will Koivun remain healthy, retain full PGA Tour status, and be inside the OWGR top 40 in August 2026? \u2014 Baseline eligibility/availability gate \u2014 injury or a slump in his rookie season would eliminate any chance.\n\nCombination rule: **weighted_average**\n\n## Synthesized evidence\n1. [sq2 | article_search | STRONG cred 95 | UP | RECENT] Jackson Koivun won the 3M Open on July 26, 2026 by three strokes in only his third professional start, beating Scottie Scheffler.\n2. [sq2 | article_search | MODERATE cred 92 | UP | RECENT] Koivun shot 61 in round three and went bogey-free on the weekend for a tournament-record 25-under total.\n3. [sq1 | article_search | STRONG cred 88 | DOWN | RECENT] Koivun turned pro only after leading Auburn to the NCAA championship in June 2026, giving him roughly three pro starts before August qualifying closes.\n4. [sq1 | wikipedia_lookup | MODERATE cred 70 | DOWN | DATED] U.S. Presidents Cup automatic qualifying uses points accumulated over multiple seasons, a system that structurally disadvantages a player with only weeks of pro results.\n5. [sq3 | article_search | MODERATE cred 72 | UP | RECENT] CBS Sports published a piece headlined that rookie Koivun \u0027made the U.S. Presidents Cup selections a bit more difficult,\u0027 indicating he is in captain\u0027s-pick conversation.\n6. [sq3 | code_execution | WEAK cred 40 | NEUTRAL | VERY_RECENT] Modeled base rate for a first-year PGA Tour pro occupying any given U.S. Presidents Cup slot is roughly 1%, with scenario-weighted estimates for Koivun in the 10-21% range.\n7. [sq4 | article_search | STRONG cred 85 | UP | RECENT] A PGA Tour victory confers multi-year exempt status, so Koivun\u0027s 3M Open win secures full Tour membership and eligibility.\n8. [sq4 | wikipedia_lookup | MODERATE cred 90 | UP | DATED] Koivun reached No. 1 in the World Amateur Golf Ranking in June 2025 and swept all four major collegiate awards as a freshman in 2024.\n9. [sq1 | wikipedia_lookup | STRONG cred 95 | NEUTRAL | DATED] The 2026 Presidents Cup is scheduled for September 24-27 at Medinah Country Club, with qualifying closing in August 2026.\n10. [sq2 | article_search | WEAK cred 35 | NEUTRAL | VERY_RECENT] No reporting was found of additional Koivun top-5 finishes beyond the 3M Open win as of mid-August 2026.\n11. [sq3 | article_search | WEAK cred 30 | NEUTRAL | VERY_RECENT] No article in the research set confirms Brandt Snedeker\u0027s captaincy or any public statement of his about Koivun.\n12. [sq1 | article_search | WEAK cred 60 | NEUTRAL | VERY_RECENT] The article search returned mostly irrelevant results (Michael Jackson, World Cup, politics), indicating thin golf-specific coverage in this dataset.\n\n## Cross-Market Signals\n\n### No signal found\n\nInformation gaps:\n - Current U.S. Presidents Cup points standings position for Koivun\n - Koivun\u0027s OWGR ranking after the 3M Open win\n - Historical base rate: rookies/first-year pros receiving Presidents Cup captain\u0027s picks\n - Captain Snedeker\u0027s public comments and pick criteria; team announcement date\n\nKey uncertainties:\n - Whether one win generates enough points for top-6 auto qualification\n - Koivun\u0027s results in remaining events before August qualifying close\n - Depth of competing American candidates for six captain\u0027s picks\n - Whether captain favors experience over rookie form\n\n## Required pre-forecast walkthrough\n\nBefore giving probabilities, walk through these explicitly:\n (a) The time left until the question resolves.\n (b) The status quo outcome \u2014 what happens if nothing changes from today.\n (c) A brief scenario that results in NO.\n (d) A brief scenario that results in YES.\n\n## Calibration guidance\n\n- **Estimate each sub-question in isolation.** Do not let your answer to one sub-question anchor your answer to another. This is the core of Fermi decomposition \u2014 independence forces more careful reasoning per factor.\n- **Anchor on the status quo.** Require strong specific evidence to move far from it.\n- 0.05 / 0.95 require strong, multi-source evidence. Avoid \u003e0.97 or \u003c0.03 unless the outcome is already settled or near-tautological \u2014 overconfident misses are punished heavily by the log score.\n- **Anchor on prediction markets.** If liquid market prices (Polymarket / Kalshi) or a community forecast appear in the evidence, treat them as a strong, well-calibrated prior. Your final estimate should rarely sit more than ~15 percentage points from a liquid market on the SAME question \u2014 move further only with specific evidence the market lacks.\n- **Treat research as fallible, not ground truth.** A single-source or \"very recent\" claim \u2014 especially one the evidence flags as unverified, possibly AI-generated, or low-credibility \u2014 must not drive you to near-certainty. When a load-bearing fact is unverified, keep at least 10-15% on the chance it is wrong.\n- **Also provide a holistic estimate** \u2014 your overall gut feeling about the main question, BEFORE you see the mathematical combination. This serves as a sanity check: if the Fermi result and holistic estimate diverge wildly, something is wrong.\n\n## Output\n\nReturn ONLY valid JSON, no markdown fences:\n\n{\n \"rationale\": \"\u003caddress (a) (b) (c) (d) above \u2014 5-8 sentences total\u003e\",\n \"sub_question_estimates\": {\n \"sq1\": \u003cfloat in [0.01, 0.99]\u003e,\n \"sq2\": \u003cfloat in [0.01, 0.99]\u003e,\n \"sq3\": \u003cfloat in [0.01, 0.99]\u003e,\n \"sq4\": \u003cfloat in [0.01, 0.99]\u003e\n },\n \"holistic_p_yes\": \u003cfloat in [0.01, 0.99] \u2014 your overall estimate ignoring the decomposition\u003e,\n \"what_would_change_my_mind\": \"\u003c1-2 sentences: what new info would push you above 70% or below 30%\u003e\"\n}\n",
"holistic_p_yes": 0.25,
"models": [
"opus",
"secondary"
],
"p_yes": 0.3579,
"rationale": "(a) Qualifying closes in August 2026 and the team is announced shortly after, with the matches September 24-27 at Medinah \u2014 so only weeks remain and most of the relevant evidence is already in. (b) Status quo: Koivun is a three-start professional who just won the 3M Open; he is in the captain\u0027s-pick conversation but is not on the team, and the default outcome if nothing changes is that a captain fills six picks with more established, higher-ranked Americans. (c) NO scenario: the two-season points list leaves Koivun far outside the top 6, he adds no further top-5s in the playoffs (evidence suggests none through mid-August), and Snedeker prioritizes proven veterans and pairing chemistry over a 21-year-old with a five-week pro resume. (d) YES scenario: the 3M win plus strong FedEx Cup playoff performances vault him into the OWGR top ~50, the captain leans into form and the marquee-storyline value of the collegiate superstar, and a weak/injured field of alternatives opens a pick. (Sub-question notes: sq1 is very unlikely because Presidents Cup points accumulate over two seasons and he has three pro starts; sq2 is essentially already satisfied by the 3M Open win; sq3 is the load-bearing path and rookies with a single win rarely displace established picks; sq4 is gated less by health/status \u2014 a win gives multi-year exemption \u2014 than by the OWGR top-40 threshold, which is hard to clear with a minimum 40-event divisor after only a handful of starts.)",
"sub_question_estimates": {
"sq1": 0.05,
"sq2": 0.95,
"sq3": 0.25,
"sq4": 0.25
},
"what_would_change_my_mind": "Above 70%: reporting that Snedeker has publicly signaled Koivun is effectively locked in, or Koivun adding a second win/multiple top-5s in the FedEx Cup playoffs and jumping inside the OWGR top 30. Below 30% (further): confirmation that Koivun sits outside the top 25 in points and that the captain has named a veteran-heavy pick shortlist excluding him."
},
"plan": {
"combination_logic": "weighted_average",
"domain": "culture",
"n_sub_qs": 4,
"n_tools": 5,
"reasoning_approach": "Weight the automatic-qualification path, the form/performance driver, the captain\u0027s-pick path, and the availability gate, then blend into a single probability anchored on the low historical base rate of first-year PGA Tour pros making the U.S. Presidents Cup team, adjusted upward for Koivun\u0027s exceptional early results and any evidence of standings position or captain interest.",
"sub_questions": [
{
"id": "sq1",
"question": "Will Jackson Koivun finish inside the top 6 of the U.S. Presidents Cup automatic qualifying standings when qualifying closes in August 2026?",
"rationale": "Automatic qualification is the cleanest path to selection and requires elite, sustained 2026 results (wins/majors).",
"weight": 0.25
},
{
"id": "sq2",
"question": "Will Koivun win a PGA Tour event or record at least three top-5 finishes between now and the end of Presidents Cup qualifying in August 2026?",
"rationale": "Form is the dominant driver of both automatic qualification and captain\u0027s-pick consideration; a win essentially puts him in the conversation.",
"weight": 0.3
},
{
"id": "sq3",
"question": "Conditional on not auto-qualifying, will U.S. captain Brandt Snedeker use one of the six captain\u0027s picks on Koivun?",
"rationale": "Most likely path; depends on standings position, captain\u0027s stated preferences for veterans vs. rookies, and team-room fit.",
"weight": 0.35
},
{
"id": "sq4",
"question": "Will Koivun remain healthy, retain full PGA Tour status, and be inside the OWGR top 40 in August 2026?",
"rationale": "Baseline eligibility/availability gate \u2014 injury or a slump in his rookie season would eliminate any chance.",
"weight": 0.1
}
],
"tool_requests": [
{
"parameters": {
"lookback_days": 120,
"queries": [
"Jackson Koivun PGA Tour results Presidents Cup",
"U.S. Presidents Cup 2026 standings captain\u0027s picks Snedeker",
"Jackson Koivun rookie season win contention"
]
},
"target_sub_questions": [
"sq1",
"sq2",
"sq4"
],
"tool_name": "article_search"
},
{
"parameters": {
"brief": "Find the current state of Jackson Koivun\u0027s professional golf career: his 2025-2026 PGA Tour results, world ranking, current position in the U.S. Presidents Cup points standings, and any commentary from U.S. captain Brandt Snedeker or analysts about him being a Presidents Cup candidate. Also confirm the 2026 Presidents Cup dates, venue, team selection format (auto qualifiers vs captain\u0027s picks) and the date qualifying closes and picks are announced.",
"max_searches": 4,
"question_title": "Will 21 year-old Jackson Koivun be named to the United States team for the 2026 Presidents Cup?"
},
"target_sub_questions": [
"sq1",
"sq3",
"sq4"
],
"tool_name": "claude_news"
},
{
"parameters": {
"queries": [
"2026 Presidents Cup",
"List of American Presidents Cup golfers",
"Jackson Koivun",
"Presidents Cup format and qualification"
]
},
"target_sub_questions": [
"sq1",
"sq3"
],
"tool_name": "wikipedia_lookup"
},
{
"parameters": {
"code": "import numpy as np\n# Base rate: how often does a PGA Tour rookie (first full season) make the US Presidents Cup team?\n# Historical rookies on US Presidents Cup teams since 1994 (12-man teams, ~15 editions)\nteams = 15\nplayers = teams*12\n# Approx count of true first-year-pro rookies selected (e.g., Sam Burns no, Tom Kim was Intl; US examples rare)\nrookie_first_year_selections = 2 # generous estimate\nbase = rookie_first_year_selections/players\nprint(\u0027base rate any given first-year pro-ish slot\u0027, base)\n# Conditional framing: given a player is a highly touted rookie with early tour success,\n# probability of making team\nfor p_win in [0.15,0.25,0.35]:\n for p_pick_given_win in [0.35,0.5]:\n p = p_win*p_pick_given_win + (1-p_win)*0.05\n print(p_win, p_pick_given_win, round(p,3))\n",
"description": "Estimate base rate of first-year PGA Tour pros making the US Presidents Cup team and scenario-weighted probabilities."
},
"target_sub_questions": [
"sq1",
"sq3"
],
"tool_name": "code_execution"
},
{
"parameters": {
"queries": [
"Jackson Koivun latest results 2026",
"US Presidents Cup 2026 team standings current",
"Brandt Snedeker Presidents Cup captain picks Koivun"
]
},
"target_sub_questions": [
"sq2",
"sq3"
],
"tool_name": "web_search"
}
]
},
"question": {
"close_time": "2026-08-14T06:00:00Z",
"description": "## Description\nCBS Sports: [Why PGA Tour rookie Jackson Koivun made the U.S. Presidents Cup selections a bit more difficult](https://www.cbssports.com/golf/news/u-s-presidents-cup-team-jackson-koivun-roster/)\n\n`{\"format\": \"bot_tournament_question\", \"info\": {\"hash_id\": \"672cf1f33e488918\", \"sheet_id\": \"161\"}}`\n\n## Resolution Criteria\nThis question resolves as **Yes** if Jackson Koivun is selected to play in the 2026 [Presidents Cup](https://en.wikipedia.org/wiki/List_of_American_Presidents_Cup_golfers) to represent the American team.",
"question_type": "binary",
"title": "Will 21 year-old Jackson Koivun be named to the United States team for the 2026 Presidents Cup?"
},
"research": {
"cross_market_brief": "## Cross-Market Signals\n\n### No signal found",
"errors": [],
"has_cross_market": true,
"n_errors": 0,
"n_tools": 5,
"tools": [
{
"elapsed_s": 0.76,
"error": null,
"success": true,
"summary": "25 articles",
"tool_name": "article_search"
},
{
"elapsed_s": 22.45,
"error": null,
"success": true,
"summary": "13 citations",
"tool_name": "claude_news"
},
{
"elapsed_s": 1.43,
"error": null,
"success": true,
"summary": "3 pages",
"tool_name": "wikipedia_lookup"
},
{
"elapsed_s": 0.18,
"error": null,
"success": true,
"summary": "Estimate base rate of first-year PGA Tour pros making the US",
"tool_name": "code_execution"
},
{
"elapsed_s": 28.94,
"error": null,
"success": true,
"summary": "20 results",
"tool_name": "web_search"
}
]
},
"synthesis": {
"error": null,
"evidence": [
{
"claim": "Jackson Koivun won the 3M Open on July 26, 2026 by three strokes in only his third professional start, beating Scottie Scheffler.",
"credibility": 95,
"direction": "UP",
"priced_in": true,
"recency": "RECENT",
"source": "article_search",
"strength": "STRONG",
"sub_question_id": "sq2"
},
{
"claim": "Koivun shot 61 in round three and went bogey-free on the weekend for a tournament-record 25-under total.",
"credibility": 92,
"direction": "UP",
"priced_in": true,
"recency": "RECENT",
"source": "article_search",
"strength": "MODERATE",
"sub_question_id": "sq2"
},
{
"claim": "Koivun turned pro only after leading Auburn to the NCAA championship in June 2026, giving him roughly three pro starts before August qualifying closes.",
"credibility": 88,
"direction": "DOWN",
"priced_in": true,
"recency": "RECENT",
"source": "article_search",
"strength": "STRONG",
"sub_question_id": "sq1"
},
{
"claim": "U.S. Presidents Cup automatic qualifying uses points accumulated over multiple seasons, a system that structurally disadvantages a player with only weeks of pro results.",
"credibility": 70,
"direction": "DOWN",
"priced_in": true,
"recency": "DATED",
"source": "wikipedia_lookup",
"strength": "MODERATE",
"sub_question_id": "sq1"
},
{
"claim": "CBS Sports published a piece headlined that rookie Koivun \u0027made the U.S. Presidents Cup selections a bit more difficult,\u0027 indicating he is in captain\u0027s-pick conversation.",
"credibility": 72,
"direction": "UP",
"priced_in": true,
"recency": "RECENT",
"source": "article_search",
"strength": "MODERATE",
"sub_question_id": "sq3"
},
{
"claim": "Modeled base rate for a first-year PGA Tour pro occupying any given U.S. Presidents Cup slot is roughly 1%, with scenario-weighted estimates for Koivun in the 10-21% range.",
"credibility": 40,
"direction": "NEUTRAL",
"priced_in": false,
"recency": "VERY_RECENT",
"source": "code_execution",
"strength": "WEAK",
"sub_question_id": "sq3"
},
{
"claim": "A PGA Tour victory confers multi-year exempt status, so Koivun\u0027s 3M Open win secures full Tour membership and eligibility.",
"credibility": 85,
"direction": "UP",
"priced_in": true,
"recency": "RECENT",
"source": "article_search",
"strength": "STRONG",
"sub_question_id": "sq4"
},
{
"claim": "Koivun reached No. 1 in the World Amateur Golf Ranking in June 2025 and swept all four major collegiate awards as a freshman in 2024.",
"credibility": 90,
"direction": "UP",
"priced_in": true,
"recency": "DATED",
"source": "wikipedia_lookup",
"strength": "MODERATE",
"sub_question_id": "sq4"
},
{
"claim": "The 2026 Presidents Cup is scheduled for September 24-27 at Medinah Country Club, with qualifying closing in August 2026.",
"credibility": 95,
"direction": "NEUTRAL",
"priced_in": true,
"recency": "DATED",
"source": "wikipedia_lookup",
"strength": "STRONG",
"sub_question_id": "sq1"
},
{
"claim": "No reporting was found of additional Koivun top-5 finishes beyond the 3M Open win as of mid-August 2026.",
"credibility": 35,
"direction": "NEUTRAL",
"priced_in": false,
"recency": "VERY_RECENT",
"source": "article_search",
"strength": "WEAK",
"sub_question_id": "sq2"
},
{
"claim": "No article in the research set confirms Brandt Snedeker\u0027s captaincy or any public statement of his about Koivun.",
"credibility": 30,
"direction": "NEUTRAL",
"priced_in": false,
"recency": "VERY_RECENT",
"source": "article_search",
"strength": "WEAK",
"sub_question_id": "sq3"
},
{
"claim": "The article search returned mostly irrelevant results (Michael Jackson, World Cup, politics), indicating thin golf-specific coverage in this dataset.",
"credibility": 60,
"direction": "NEUTRAL",
"priced_in": false,
"recency": "VERY_RECENT",
"source": "article_search",
"strength": "WEAK",
"sub_question_id": "sq1"
}
],
"information_gaps": [
"Current U.S. Presidents Cup points standings position for Koivun",
"Koivun\u0027s OWGR ranking after the 3M Open win",
"Historical base rate: rookies/first-year pros receiving Presidents Cup captain\u0027s picks",
"Captain Snedeker\u0027s public comments and pick criteria; team announcement date"
],
"key_uncertainties": [
"Whether one win generates enough points for top-6 auto qualification",
"Koivun\u0027s results in remaining events before August qualifying close",
"Depth of competing American candidates for six captain\u0027s picks",
"Whether captain favors experience over rookie form"
],
"n_evidence": 12
},
"timings": {
"forecast": 98.17,
"plan": 32.72,
"research": 28.95,
"synthesis": 35.0
}
}