context: It is certain that Julius is a lion. It is probably the case that Greg is a swan. We believe that Mary picked up the apple.
hypothesis: There is almost no chance that greg is a swan, or Julius is a lion.
valid_hypothesis: It is certain that greg is a swan, or Julius is a lion.
invalid_hypothesis: There is almost no chance that greg is a swan, or Julius is a lion.
hypothesis_assertion: Greg is a swan, or Julius is a lion.