context: Chances are about even that Julius is a frog. We believe that Lily is a swan. There is little chance that Bill left the milk.
hypothesis: It is impossible that julius is a frog, or Bill left the milk.
valid_hypothesis: There is a better than even chance that julius is a frog, or Bill left the milk.
invalid_hypothesis: It is impossible that julius is a frog, or Bill left the milk.
hypothesis_assertion: Julius is a frog, or Bill left the milk.