context: It is improbable that Brian is yellow. It is certain that Julius is a frog. It is highly unlikely that Sandra got the football. It is improbable that if either Sandra got the football, or Brian is yellow, then Daniel took the milk. It is probably the case that if either Julius is a frog, or Sandra got the football, then John left the football. There is a better than even chance that if Sandra got the football, or Brian is yellow, then Bill is in the school.
hypothesis: It is highly unlikely that john left the football, and Brian is yellow.
valid_hypothesis: It is highly unlikely that john left the football, and Brian is yellow.
invalid_hypothesis: It is almost certain that john left the football, and Brian is yellow.
hypothesis_assertion: John left the football, and Brian is yellow.