context: We doubt that Brian is a lion. It is probably not the case that Greg is a frog. There is little chance that Mary moved to the garden. It is unlikely that if Greg is a frog, and Brian is a lion, then Julius is white. It is probably the case that if either Brian is a lion, or Mary moved to the garden, then Fred went to the kitchen. It is highly likely that if either Greg is a frog, or Brian is a lion, then John picked up the apple.
hypothesis: It is probably not the case that either John picked up the apple, or Mary moved to the garden.
valid_hypothesis: It is probably not the case that either John picked up the apple, or Mary moved to the garden.
invalid_hypothesis: It is certain that either John picked up the apple, or Mary moved to the garden.
hypothesis_assertion: Either John picked up the apple, or Mary moved to the garden.