Track the evidence that changed your mind.
A version of an opinion, the event that moved it, and a note explaining why the change happened.
Three primitives.
Versions, events, and effects — wired exactly where the app uses them.
What you believe
Versions
Each major change becomes a new version. Older views stay readable.
What entered
Events
Sources, conversations, and observations stay independent from conclusions.
Why it moved
Effects
The causal note lives on the edge between an event and the version it changed.