context: It is likely that Greg is gray. It is improbable that Julius is a frog. There is almost no chance that Bernhard is a swan. It is probably the case that if either Bernhard is a swan, or Greg is gray, then Mary moved to the garden. It is likely that if either Bernhard is a swan, or Julius is a frog, then Brian is yellow. We believe that if Bernhard is a swan, or Julius is a frog, then John dropped the apple.
hypothesis: It is almost certain that brian is yellow, or John dropped the apple.
valid_hypothesis: There is little chance that brian is yellow, or John dropped the apple.
invalid_hypothesis: It is almost certain that brian is yellow, or John dropped the apple.
hypothesis_assertion: Brian is yellow, or John dropped the apple.