context: Chances are slight that Brian is a frog. There is little chance that Fred went to the hallway. It is likely that Greg is a rhino. There is a very good chance that if Greg is a rhino, or Brian is a frog, then Daniel is in the garden. It is probable that if either Brian is a frog, or Fred went to the hallway, then Jessica is a cat. It is probable that if Fred went to the hallway, and Brian is a frog, then John put down the milk.
hypothesis: It is likely that fred went to the hallway, and John put down the milk.
valid_hypothesis: It is impossible that fred went to the hallway, and John put down the milk.
invalid_hypothesis: It is likely that fred went to the hallway, and John put down the milk.
hypothesis_assertion: Fred went to the hallway, and John put down the milk.