context: It is almost certain that Lily is yellow. It is highly unlikely that Sandra dropped the milk. Chances are about even that Julius is a rhino. We doubt that if either Lily is yellow, or Julius is a rhino, then John left the football. It is impossible that if either Lily is yellow, or Julius is a rhino, then Mary went to the garden. It is probably not the case that if Julius is a rhino, and Sandra dropped the milk, then Brian is a swan.
hypothesis: It is highly likely that either Mary went to the garden, or Sandra dropped the milk.
valid_hypothesis: It is highly unlikely that either Mary went to the garden, or Sandra dropped the milk.
invalid_hypothesis: It is highly likely that either Mary went to the garden, or Sandra dropped the milk.
hypothesis_assertion: Either Mary went to the garden, or Sandra dropped the milk.