context: There is a very good chance that Bill left the milk. It is improbable that Lily is yellow. It is impossible that Brian is white.
hypothesis: There is a very good chance that brian is white, or Bill left the milk.
valid_hypothesis: There is a very good chance that brian is white, or Bill left the milk.
invalid_hypothesis: There is little chance that brian is white, or Bill left the milk.
hypothesis_assertion: Brian is white, or Bill left the milk.