second-guess

verb (used with object)

1. to use hindsight in criticizing or correcting.
2. to predict (something) or outguess (someone): We must try to second-guess what he’ll do next.

verb informal

1. to criticize or evaluate with hindsight
2. to attempt to anticipate or predict (a person or thing)

v.1941, back-formation from second-guesser (1937), American English, originally baseball slang for a fan who loudly questions decisions by players, managers, etc.; perhaps from guesser in the baseball slang sense of “umpire.”