context: It is likely that Winona is a cat. It is likely that Brian is a lion. It is highly unlikely that Mary left the football.
hypothesis: There is almost no chance that either Mary left the football, or Brian is a lion.
valid_hypothesis: It is probably the case that either Mary left the football, or Brian is a lion.
invalid_hypothesis: There is almost no chance that either Mary left the football, or Brian is a lion.
hypothesis_assertion: Either Mary left the football, or Brian is a lion.