context: It is probable that John left the football. It is probably the case that Mary went to the bedroom. It is unlikely that Sandra took the apple. We doubt that if John left the football, and Sandra took the apple, then Bernhard is green. It is probable that if Mary went to the bedroom, and Sandra took the apple, then Julius is a frog. It is probably not the case that if John left the football, or Mary went to the bedroom, then Greg is gray.
hypothesis: It is probably not the case that either Julius is a frog, or Greg is gray.
valid_hypothesis: It is probably not the case that either Julius is a frog, or Greg is gray.
invalid_hypothesis: There is a very good chance that either Julius is a frog, or Greg is gray.
hypothesis_assertion: Either Julius is a frog, or Greg is gray.