Probably the best examples involve instances of judging the wisdom of a decision made under extreme uncertainty based on how it came out. So the decision to try to steal a base was praiseworthy if the runner was safe but foolish if the runner got thrown out, and things like that. More broadly, the phenomenon is very strong opinions based on limited or misinterpreted evidence. For example, there are a couple of pitchers on the Yankees right now where there is a big debate about whether they are better suited to be starting pitchers or to be relievers. People have incredibly strong opinions about this on the basis of next to no information, and they regard those opinions as being altogether vindicated in each individual instance where the pitcher does well in their preferred role.