context: We believe that Brian is gray. It is probably the case that Julius is green. It is highly likely that Bill moved to the garden. There is a very good chance that if Julius is green, and Brian is gray, then Greg is a frog. It is highly unlikely that if Brian is gray, and Julius is green, then John picked up the apple. Chances are slight that if Bill moved to the garden, or Julius is green, then Sandra left the milk.
hypothesis: It is likely that either Sandra left the milk, or Brian is gray.
valid_hypothesis: It is likely that either Sandra left the milk, or Brian is gray.
invalid_hypothesis: Chances are slight that either Sandra left the milk, or Brian is gray.
hypothesis_assertion: Either Sandra left the milk, or Brian is gray.