context: It is highly unlikely that Greg is a swan. It is impossible that John left the football. It is probably not the case that Sandra took the apple. It is impossible that if John left the football, or Sandra took the apple, then Lily is green. It is unlikely that if John left the football, or Greg is a swan, then Mary went to the garden. It is probable that if either Greg is a swan, or Sandra took the apple, then Julius is a lion.
hypothesis: We doubt that john left the football, or Julius is a lion.
valid_hypothesis: We doubt that john left the football, or Julius is a lion.
invalid_hypothesis: It is probable that john left the football, or Julius is a lion.
hypothesis_assertion: John left the football, or Julius is a lion.