context: It is certain that John took the apple. There is little chance that Lily is a frog. There is a very good chance that Julius is a swan. It is probably not the case that if either Julius is a swan, or John took the apple, then Bill dropped the milk. It is highly likely that if Julius is a swan, or John took the apple, then Brian is green. It is impossible that if either Lily is a frog, or Julius is a swan, then Mary went to the office.
hypothesis: It is probably not the case that brian is green, or Julius is a swan.
valid_hypothesis: It is certain that brian is green, or Julius is a swan.
invalid_hypothesis: It is probably not the case that brian is green, or Julius is a swan.
hypothesis_assertion: Brian is green, or Julius is a swan.