Keep a second-order decision journal

Record the downstream effects you predicted, then check them later.

Why it works

Hindsight bias rewrites memory so past outcomes feel like they were obvious all along, which prevents learning. Writing your predicted second-order effects before the fact creates a fixed record to compare against, calibrating your forecasting over time. The journal is the only way to know whether your "and then what" was actually right.

How to do it

1. When you decide, write the second- and third-order effects you expect.
2. Set a date to revisit the entry.
3. On review, compare what happened to what you predicted and note the gap.

Evidence

Supported by research on hindsight bias and on the value of recording predictions to improve calibration. Forecasters who log and score predictions become measurably better calibrated over time. (observational)

The calibration benefit of recorded predictions is studied; the specific "second-order journal" format is an applied version.

Sources

• Hindsight bias literature (Fischhoff); forecasting-calibration research (e.g., Tetlock, superforecasting work)

Common mistake

Only writing the decision, not the predicted consequences — so hindsight later tells you that you "knew it all along".