context: It is probably the case that Bernhard is a lion. It is impossible that Brian is a frog. It is probable that Fred went to the garden. It is probably not the case that if either Bernhard is a lion, or Brian is a frog, then Mary grabbed the milk. It is likely that if Brian is a frog, and Bernhard is a lion, then John got the apple. It is highly unlikely that if Bernhard is a lion, or Brian is a frog, then Greg is gray.
hypothesis: We doubt that mary grabbed the milk, or Brian is a frog.
valid_hypothesis: We doubt that mary grabbed the milk, or Brian is a frog.
invalid_hypothesis: It is almost certain that mary grabbed the milk, or Brian is a frog.
hypothesis_assertion: Mary grabbed the milk, or Brian is a frog.