context: It is highly unlikely that John went to the kitchen. Chances are about even that Sandra left the apple. It is highly unlikely that Mary got the milk. It is certain that if either Sandra left the apple, or John went to the kitchen, then Julius is a frog. It is improbable that if Mary got the milk, or John went to the kitchen, then Greg is a lion. It is probably the case that if Mary got the milk, or Sandra left the apple, then Bernhard is a lion.
hypothesis: There is almost no chance that julius is a frog, or Bernhard is a lion.
valid_hypothesis: Chances are about even that julius is a frog, or Bernhard is a lion.
invalid_hypothesis: There is almost no chance that julius is a frog, or Bernhard is a lion.
hypothesis_assertion: Julius is a frog, or Bernhard is a lion.