context: It is improbable that Greg is gray. Chances are about even that Julius is yellow. Chances are about even that Brian is a frog. It is unlikely that if Julius is yellow, and Brian is a frog, then Bill went to the bedroom. It is likely that if Brian is a frog, or Greg is gray, then Daniel left the apple. It is highly unlikely that if Greg is gray, and Brian is a frog, then John took the football.
hypothesis: Chances are about even that either Daniel left the apple, or John took the football.
valid_hypothesis: Chances are about even that either Daniel left the apple, or John took the football.
invalid_hypothesis: It is impossible that either Daniel left the apple, or John took the football.
hypothesis_assertion: Either Daniel left the apple, or John took the football.