context: It is improbable that Lily is a rhino. It is highly unlikely that Brian is gray. It is probably the case that Greg is yellow.
hypothesis: It is probable that brian is gray, or Greg is yellow.
valid_hypothesis: It is probable that brian is gray, or Greg is yellow.
invalid_hypothesis: There is little chance that brian is gray, or Greg is yellow.
hypothesis_assertion: Brian is gray, or Greg is yellow.