context: It is probably the case that Mary went to the kitchen. It is almost certain that Bernhard is a swan. We believe that Lily is yellow. It is unlikely that if Lily is yellow, and Bernhard is a swan, then Jessica is a wolf. Chances are slight that if Bernhard is a swan, or Mary went to the kitchen, then Daniel dropped the milk. There is a better than even chance that if Mary went to the kitchen, or Lily is yellow, then Greg is a frog.
hypothesis: It is impossible that either Mary went to the kitchen, or Lily is yellow.
valid_hypothesis: Chances are about even that either Mary went to the kitchen, or Lily is yellow.
invalid_hypothesis: It is impossible that either Mary went to the kitchen, or Lily is yellow.
hypothesis_assertion: Either Mary went to the kitchen, or Lily is yellow.