context: It is certain that Greg is a rhino. We doubt that John left the milk. It is probably the case that Mary dropped the apple. It is almost certain that if either Greg is a rhino, or Mary dropped the apple, then Bernhard is a swan. It is likely that if Greg is a rhino, or John left the milk, then Lily is a frog. There is almost no chance that if John left the milk, and Mary dropped the apple, then Sandra took the football.
hypothesis: We believe that lily is a frog, or John left the milk.
valid_hypothesis: We believe that lily is a frog, or John left the milk.
invalid_hypothesis: There is almost no chance that lily is a frog, or John left the milk.
hypothesis_assertion: Lily is a frog, or John left the milk.