context: There is little chance that Mary moved to the office. Chances are about even that John dropped the milk. We doubt that Bernhard is yellow. It is highly likely that if Bernhard is yellow, and Mary moved to the office, then Greg is a rhino. It is highly unlikely that if either Bernhard is yellow, or Mary moved to the office, then Brian is a frog. It is improbable that if either Bernhard is yellow, or Mary moved to the office, then Lily is green.
hypothesis: It is impossible that lily is green, and Greg is a rhino.
valid_hypothesis: It is impossible that lily is green, and Greg is a rhino.
invalid_hypothesis: It is likely that lily is green, and Greg is a rhino.
hypothesis_assertion: Lily is green, and Greg is a rhino.