context: It is impossible that John discarded the apple. We believe that Greg is white. It is likely that Julius is a frog. It is improbable that if either John discarded the apple, or Julius is a frog, then Sandra left the football. There is little chance that if either John discarded the apple, or Julius is a frog, then Mary went to the office. There is almost no chance that if Julius is a frog, or John discarded the apple, then Bernhard is a swan.
hypothesis: It is highly unlikely that sandra left the football, or John discarded the apple.
valid_hypothesis: It is highly unlikely that sandra left the football, or John discarded the apple.
invalid_hypothesis: Chances are about even that sandra left the football, or John discarded the apple.
hypothesis_assertion: Sandra left the football, or John discarded the apple.