context: It is highly likely that Brian is a lion. There is almost no chance that Daniel got the apple. It is likely that Mary is in the school. Chances are about even that if either Mary is in the school, or Daniel got the apple, then Sandra left the football. We believe that if either Mary is in the school, or Daniel got the apple, then Greg is yellow. Chances are about even that if Mary is in the school, and Brian is a lion, then John picked up the milk.
hypothesis: It is almost certain that either Daniel got the apple, or Greg is yellow.
valid_hypothesis: Chances are about even that either Daniel got the apple, or Greg is yellow.
invalid_hypothesis: It is almost certain that either Daniel got the apple, or Greg is yellow.
hypothesis_assertion: Either Daniel got the apple, or Greg is yellow.