Hindsight bias

The often erroneous but common belief that one could have predicted a past event more accurately than one has done or that in a past situation one would have taken a decision with a better outcome than the one actually taken by someone else – can lead to incorrect explanations for the occurrence of events, as well as influencing the perceived likelihood of those events.

(see also: Creeping determinism, Post hoc reasoning, ad hoc, overconfidence, Forer (Barnum) effect, Confirmation bias, Belief perserverance, belief bias, cognitive bias, Selective exposure, thinking error, critical thinking, wishful thinking)