context: There is a very good chance that Bernhard is yellow. Chances are slight that Greg is gray. It is improbable that Brian is white. It is certain that if either Bernhard is yellow, or Greg is gray, then Emily is a mouse. It is likely that if Greg is gray, and Bernhard is yellow, then Julius is a rhino. It is unlikely that if Greg is gray, or Brian is white, then John moved to the garden.
hypothesis: It is probable that either Brian is white, or Greg is gray.
valid_hypothesis: It is unlikely that either Brian is white, or Greg is gray.
invalid_hypothesis: It is probable that either Brian is white, or Greg is gray.
hypothesis_assertion: Either Brian is white, or Greg is gray.