context: It is probably the case that Sandra took the football. It is certain that Julius is a rhino. It is almost certain that Antoine is thirsty. We doubt that if Sandra took the football, and Antoine is thirsty, then Mary picked up the apple. Chances are slight that if either Sandra took the football, or Antoine is thirsty, then Fred is in the office. We doubt that if either Julius is a rhino, or Sandra took the football, then Greg is yellow.
hypothesis: It is likely that greg is yellow, and Sandra took the football.
valid_hypothesis: It is impossible that greg is yellow, and Sandra took the football.
invalid_hypothesis: It is likely that greg is yellow, and Sandra took the football.
hypothesis_assertion: Greg is yellow, and Sandra took the football.