Hindsight changes our judgement
After learning an outcome, people often feel that it was more predictable than it appeared beforehand. Knowledge of the result changes how earlier information is remembered and interpreted.
Vague predictions fit many events
Statements about conflict, death, political change, natural disaster or economic trouble are likely to match something eventually.
Symbolic language expands the number of possible matches further.
Details are connected retrospectively
After an event, interpreters search old statements for words that resemble aspects of what happened. The event determines which parts of the prediction are treated as important.
Failed predictions disappear
Public attention tends to focus on apparent successes. Predictions that failed, were forgotten or were quietly revised receive less attention.
Dates and meanings may shift
When an event does not occur on time, the date may be reinterpreted, recalculated or described as the beginning of a longer process.
A claim that can accommodate every result cannot be meaningfully tested.
Memory becomes more definite
People may remember having been more certain than they actually were. Informal predictions are especially vulnerable because the original wording was never recorded.
How to test a prediction
The complete prediction should be dated and preserved before the event. It should specify the outcome, time period, location and conditions of success.
Every prediction must be counted, not only the successful ones.
Evidence notes
Predictions should be evaluated prospectively rather than reconstructed retrospectively.
A scoring system agreed in advance prevents interpreters from changing the meaning after the outcome is known.
Ethical questions
Predictions can create fear, influence investments or encourage harmful decisions. People presenting predictions as reliable knowledge should disclose failures and uncertainty.
Conclusion
Predictions often seem accurate after events because hindsight makes outcomes appear more foreseeable, vague language permits flexible matching and failed predictions are forgotten.
A genuine prediction must be specific, recorded beforehand and evaluated according to rules that cannot be rewritten afterwards.