context: It is impossible that Brian is yellow. It is probably not the case that Sandra took the football. It is improbable that Lily is a frog. There is a very good chance that if either Lily is a frog, or Sandra took the football, then Mary moved to the garden. It is unlikely that if either Lily is a frog, or Brian is yellow, then Bernhard is white. It is certain that if Sandra took the football, and Brian is yellow, then Greg is a lion.
hypothesis: It is probably not the case that brian is yellow, or Sandra took the football.
valid_hypothesis: It is probably not the case that brian is yellow, or Sandra took the football.
invalid_hypothesis: We believe that brian is yellow, or Sandra took the football.
hypothesis_assertion: Brian is yellow, or Sandra took the football.