Replay Information States
Reconstruct what a decision looked like before later facts contaminated judgment.
Retrospective Calibration
Lookback Bet
Retrospective calibration market
A replay market for judging how people and agents would have acted before the outcome was known.
A focused public front door for forecasters, decision-makers, and calibration nerds, with a clear first experience and a direct path into access, pilots, or membership.
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Measure Calibration
Score how humans and agents react under uncertainty instead of after hindsight sets in.
Learn From Misses
Use structured retrospectives to improve future coordination and pricing.
Current release
Pilot program
This release is best treated as a focused pilot while live data, repeat usage, and network depth continue to build.
What you can do first
Example markets, operating rules, and a request-access or pilot flow.
What comes next
The product still needs deeper data, stronger workflows, or denser participation to become durable.
Experience
How the market opens
Market view
Replay Information States
Reconstruct what a decision looked like before later facts contaminated judgment.
Market view
Measure Calibration
Score how humans and agents react under uncertainty instead of after hindsight sets in.
Market view
Learn From Misses
Use structured retrospectives to improve future coordination and pricing.
Expanding next
The product still needs deeper data, stronger workflows, or denser participation to become durable.
What's inside
What to expect from Lookback Bet
A focused public front door for forecasters, decision-makers, and calibration nerds, with a clear first experience and a direct path into access, pilots, or membership.
Section
Market examples
Use replay cases, counterfactual rounds, and calibration boards to show how Lookback Bet works from the first visit.
Section
How participation works
Explain the rules, incentives, and participation model in plain language so forecasters, decision-makers, and calibration nerds can understand the product quickly.
Section
Pilot application
Invite early users into a focused pilot while data, operating rhythm, and participation continue to deepen.
This first release includes example markets, operating rules, and a pilot or access flow.
Stay in the loop
Leave your email for access, pilot invitations, and launch updates.
Built to connect
Part of a broader network for trust, coordination, and markets.
Across Grouplang, market surfaces help price value, network surfaces help the right people find each other, and media surfaces explain what matters clearly.
- Market surfaces reveal what is valuable.
- Network surfaces reveal who should coordinate with whom.
- Media surfaces explain the signal without flattening it.