context: It is likely that Brian is a frog. We believe that Daniel grabbed the milk. It is unlikely that Julius is yellow.
hypothesis: Chances are about even that brian is a frog, and Daniel grabbed the milk.
valid_hypothesis: Chances are about even that brian is a frog, and Daniel grabbed the milk.
invalid_hypothesis: It is highly unlikely that brian is a frog, and Daniel grabbed the milk.
hypothesis_assertion: Brian is a frog, and Daniel grabbed the milk.