context: It is likely that Daniel left the apple. It is improbable that Lily is a frog. Chances are slight that Fred went to the hallway. There is little chance that if Daniel left the apple, or Lily is a frog, then Emily is a cat. It is improbable that if Lily is a frog, or Fred went to the hallway, then Greg is a lion. It is probably the case that if Lily is a frog, and Fred went to the hallway, then Sandra took the milk.
hypothesis: There is little chance that either Lily is a frog, or Sandra took the milk.
valid_hypothesis: There is little chance that either Lily is a frog, or Sandra took the milk.
invalid_hypothesis: There is a very good chance that either Lily is a frog, or Sandra took the milk.
hypothesis_assertion: Either Lily is a frog, or Sandra took the milk.