context: It is probably not the case that Mary put down the milk. It is impossible that Brian is green. It is probably the case that Sandra took the football. Chances are about even that if Mary put down the milk, or Sandra took the football, then Lily is a swan. We believe that if Mary put down the milk, or Brian is green, then Greg is a rhino. It is certain that if either Mary put down the milk, or Sandra took the football, then Winona is a wolf.
hypothesis: It is impossible that lily is a swan, or Sandra took the football.
valid_hypothesis: We believe that lily is a swan, or Sandra took the football.
invalid_hypothesis: It is impossible that lily is a swan, or Sandra took the football.
hypothesis_assertion: Lily is a swan, or Sandra took the football.