context: It is almost certain that Jeff went to the garden. It is probable that Greg is green. There is almost no chance that Brian is a swan. There is little chance that if Jeff went to the garden, or Greg is green, then Fred left the football. It is unlikely that if Jeff went to the garden, or Brian is a swan, then Lily is gray. Chances are slight that if Brian is a swan, and Greg is green, then Daniel put down the milk.
hypothesis: It is likely that either Lily is gray, or Brian is a swan.
valid_hypothesis: We doubt that either Lily is gray, or Brian is a swan.
invalid_hypothesis: It is likely that either Lily is gray, or Brian is a swan.
hypothesis_assertion: Either Lily is gray, or Brian is a swan.