context: It is highly unlikely that Greg is gray. We doubt that Julius is a rhino. We doubt that Brian is green. Chances are about even that if Brian is green, or Greg is gray, then Bernhard is a swan. It is probable that if either Greg is gray, or Julius is a rhino, then Mary moved to the garden. It is highly likely that if Greg is gray, or Julius is a rhino, then Daniel dropped the apple.
hypothesis: It is probably the case that greg is gray, or Mary moved to the garden.
valid_hypothesis: We doubt that greg is gray, or Mary moved to the garden.
invalid_hypothesis: It is probably the case that greg is gray, or Mary moved to the garden.
hypothesis_assertion: Greg is gray, or Mary moved to the garden.