context: It is probable that Mary took the milk. It is certain that John went to the hallway. Chances are slight that Lily is a rhino. There is little chance that if either Lily is a rhino, or John went to the hallway, then Brian is a lion. There is almost no chance that if Mary took the milk, and John went to the hallway, then Julius is a frog. There is a very good chance that if Mary took the milk, and John went to the hallway, then Greg is a swan.
hypothesis: It is impossible that greg is a swan, or Julius is a frog.
valid_hypothesis: There is a better than even chance that greg is a swan, or Julius is a frog.
invalid_hypothesis: It is impossible that greg is a swan, or Julius is a frog.
hypothesis_assertion: Greg is a swan, or Julius is a frog.