context: It is probably not the case that John got the apple. It is impossible that Greg is a frog. We believe that Lily is a swan. It is likely that if Lily is a swan, or John got the apple, then Julius is white. There is almost no chance that if either Lily is a swan, or Greg is a frog, then Fred moved to the office. Chances are slight that if Lily is a swan, or Greg is a frog, then Brian is white.
hypothesis: It is almost certain that either Greg is a frog, or Brian is white.
valid_hypothesis: There is little chance that either Greg is a frog, or Brian is white.
invalid_hypothesis: It is almost certain that either Greg is a frog, or Brian is white.
hypothesis_assertion: Either Greg is a frog, or Brian is white.