context: It is unlikely that Julius is green. It is certain that Brian is a frog. It is probably not the case that John picked up the apple. It is likely that if John picked up the apple, and Brian is a frog, then Winona is a wolf. It is probably not the case that if either Brian is a frog, or John picked up the apple, then Mary got the football. We doubt that if either Julius is green, or Brian is a frog, then Sandra grabbed the milk.
hypothesis: There is a very good chance that either Sandra grabbed the milk, or Brian is a frog.
valid_hypothesis: There is a very good chance that either Sandra grabbed the milk, or Brian is a frog.
invalid_hypothesis: Chances are slight that either Sandra grabbed the milk, or Brian is a frog.
hypothesis_assertion: Either Sandra grabbed the milk, or Brian is a frog.