context: Chances are about even that Julius is yellow. We doubt that Sandra took the milk. It is highly likely that Mary left the football.
hypothesis: Chances are about even that either Mary left the football, or Julius is yellow.
valid_hypothesis: Chances are about even that either Mary left the football, or Julius is yellow.
invalid_hypothesis: It is impossible that either Mary left the football, or Julius is yellow.
hypothesis_assertion: Either Mary left the football, or Julius is yellow.