context: Chances are about even that Mary is in the park. It is probably the case that Fred dropped the apple. It is likely that Sandra got the football. It is unlikely that if Fred dropped the apple, and Sandra got the football, then Julius is gray. It is almost certain that if Fred dropped the apple, and Sandra got the football, then Greg is a lion. It is highly likely that if either Mary is in the park, or Fred dropped the apple, then Bernhard is a rhino.
hypothesis: There is almost no chance that either Bernhard is a rhino, or Mary is in the park.
valid_hypothesis: It is probable that either Bernhard is a rhino, or Mary is in the park.
invalid_hypothesis: There is almost no chance that either Bernhard is a rhino, or Mary is in the park.
hypothesis_assertion: Either Bernhard is a rhino, or Mary is in the park.