context: It is likely that Sandra is in the garden. It is unlikely that Julius is yellow. It is likely that Mary left the football.
hypothesis: Chances are slight that either Mary left the football, or Julius is yellow.
valid_hypothesis: There is a better than even chance that either Mary left the football, or Julius is yellow.
invalid_hypothesis: Chances are slight that either Mary left the football, or Julius is yellow.
hypothesis_assertion: Either Mary left the football, or Julius is yellow.