context: There is almost no chance that Brian is green. There is almost no chance that Fred left the football. It is likely that Lily is a swan. Chances are slight that if Lily is a swan, and Fred left the football, then Greg is yellow. We doubt that if either Lily is a swan, or Brian is green, then Julius is a lion. It is probably not the case that if either Lily is a swan, or Brian is green, then Daniel got the apple.
hypothesis: It is likely that either Brian is green, or Julius is a lion.
valid_hypothesis: It is unlikely that either Brian is green, or Julius is a lion.
invalid_hypothesis: It is likely that either Brian is green, or Julius is a lion.
hypothesis_assertion: Either Brian is green, or Julius is a lion.