context: It is improbable that Brian is green. There is a better than even chance that Mary went to the office. There is almost no chance that Bernhard is a swan. It is certain that if Bernhard is a swan, and Mary went to the office, then Gertrude is a mouse. There is little chance that if Mary went to the office, or Brian is green, then Greg is a frog. It is probable that if either Bernhard is a swan, or Mary went to the office, then Julius is white.
hypothesis: It is certain that either Julius is white, or Greg is a frog.
valid_hypothesis: Chances are about even that either Julius is white, or Greg is a frog.
invalid_hypothesis: It is certain that either Julius is white, or Greg is a frog.
hypothesis_assertion: Either Julius is white, or Greg is a frog.