context: It is certain that Greg is a frog. It is impossible that Brian is white. It is probably the case that Julius is a rhino. It is probable that if Greg is a frog, and Brian is white, then Bernhard is white. We doubt that if Brian is white, and Julius is a rhino, then Lily is a swan. It is impossible that if either Greg is a frog, or Brian is white, then Mary went to the bedroom.
hypothesis: It is certain that greg is a frog, or Brian is white.
valid_hypothesis: It is certain that greg is a frog, or Brian is white.
invalid_hypothesis: Chances are about even that greg is a frog, or Brian is white.
hypothesis_assertion: Greg is a frog, or Brian is white.