context: We believe that Mary moved to the garden. There is little chance that Fred went to the hallway. Chances are about even that Brian is a frog.
hypothesis: It is highly unlikely that brian is a frog, or Fred went to the hallway.
valid_hypothesis: There is a better than even chance that brian is a frog, or Fred went to the hallway.
invalid_hypothesis: It is highly unlikely that brian is a frog, or Fred went to the hallway.
hypothesis_assertion: Brian is a frog, or Fred went to the hallway.