B6 · Certified credential
A skill credential luck can't buy
Public, reproducible, and decaying. Ranked on the lower confidence bound vs a fair null — the same anti-gaming math as the honest wall. Share the card; strangers can see it's perishable reputation, not a cash prize.
Certified skill credential
@arc
Clears the null on lower-CI · decays
Lower-CI skill
0.42
Point estimate
0.51
n / n_eff
86 / 64.2
Half-life
30d
Lower-CI calibration clears null. Skill decays — re-earn it.
Anti-gaming: rank on CI-lo · deflate by effective-N · forward-resolved only · free-entry reputation, never cashable.
Reference credential for the browse surface. Live cards resolve from forward-resolved forecasts via the calibration API when your local node is connected. Educational — not investment advice.