context: There is little chance that Mary went to the kitchen. Chances are slight that Brian is gray. It is certain that Fred dropped the apple. It is highly likely that if either Fred dropped the apple, or Brian is gray, then Julius is a frog. It is highly unlikely that if Fred dropped the apple, or Mary went to the kitchen, then John picked up the milk. It is highly likely that if Fred dropped the apple, or Brian is gray, then Greg is a lion.
hypothesis: It is certain that julius is a frog, or Fred dropped the apple.
valid_hypothesis: It is certain that julius is a frog, or Fred dropped the apple.
invalid_hypothesis: Chances are slight that julius is a frog, or Fred dropped the apple.
hypothesis_assertion: Julius is a frog, or Fred dropped the apple.