context: It is likely that Bill moved to the office. There is little chance that Brian is a swan. It is likely that Fred dropped the apple. There is almost no chance that if either Bill moved to the office, or Fred dropped the apple, then Julius is yellow. There is almost no chance that if either Bill moved to the office, or Brian is a swan, then Greg is a frog. It is highly likely that if Brian is a swan, and Fred dropped the apple, then Sandra took the football.
hypothesis: There is little chance that either Fred dropped the apple, or Greg is a frog.
valid_hypothesis: It is probable that either Fred dropped the apple, or Greg is a frog.
invalid_hypothesis: There is little chance that either Fred dropped the apple, or Greg is a frog.
hypothesis_assertion: Either Fred dropped the apple, or Greg is a frog.