context: It is highly unlikely that Greg is gray. It is highly unlikely that Brian is a frog. There is little chance that John dropped the apple.
hypothesis: It is almost certain that greg is gray, and Brian is a frog.
valid_hypothesis: It is impossible that greg is gray, and Brian is a frog.
invalid_hypothesis: It is almost certain that greg is gray, and Brian is a frog.
hypothesis_assertion: Greg is gray, and Brian is a frog.