context: Chances are about even that Brian is green. It is impossible that Mary went to the garden. Chances are slight that Greg is yellow. It is highly likely that if Mary went to the garden, or Greg is yellow, then Lily is a lion. It is highly likely that if Greg is yellow, and Brian is green, then Fred left the football. Chances are about even that if Mary went to the garden, or Brian is green, then Sandra put down the milk.
hypothesis: It is improbable that greg is yellow, or Fred left the football.
valid_hypothesis: It is improbable that greg is yellow, or Fred left the football.
invalid_hypothesis: There is a very good chance that greg is yellow, or Fred left the football.
hypothesis_assertion: Greg is yellow, or Fred left the football.