context: It is impossible that Bill left the milk. There is a very good chance that John went to the kitchen. Chances are about even that Mary put down the apple.
hypothesis: Chances are about even that john went to the kitchen, and Mary put down the apple.
valid_hypothesis: Chances are about even that john went to the kitchen, and Mary put down the apple.
invalid_hypothesis: It is highly unlikely that john went to the kitchen, and Mary put down the apple.
hypothesis_assertion: John went to the kitchen, and Mary put down the apple.