context: It is almost certain that Lily is a rhino. It is certain that John went to the office. Chances are slight that Brian is a frog. It is highly unlikely that if either John went to the office, or Brian is a frog, then Sandra got the apple. It is almost certain that if John went to the office, or Brian is a frog, then Greg is gray. It is highly likely that if Brian is a frog, and Lily is a rhino, then Julius is a lion.
hypothesis: It is probable that lily is a rhino, and Brian is a frog.
valid_hypothesis: Chances are slight that lily is a rhino, and Brian is a frog.
invalid_hypothesis: It is probable that lily is a rhino, and Brian is a frog.
hypothesis_assertion: Lily is a rhino, and Brian is a frog.