context: It is certain that Lily is white. We doubt that Julius is a lion. It is likely that Brian is green. It is highly likely that if Lily is white, or Brian is green, then John went to the garden. It is impossible that if Julius is a lion, and Brian is green, then Mary left the apple. It is impossible that if Julius is a lion, or Brian is green, then Greg is gray.
hypothesis: It is highly likely that either Brian is green, or John went to the garden.
valid_hypothesis: It is probably not the case that either Brian is green, or John went to the garden.
invalid_hypothesis: It is highly likely that either Brian is green, or John went to the garden.
hypothesis_assertion: Either Brian is green, or John went to the garden.