context: It is unlikely that Lily is a lion. We believe that Bernhard is a rhino. It is unlikely that John discarded the milk. There is a better than even chance that if Bernhard is a rhino, and Lily is a lion, then Brian is a frog. It is probably not the case that if Lily is a lion, and John discarded the milk, then Julius is a swan. We believe that if Bernhard is a rhino, and Lily is a lion, then Greg is gray.
hypothesis: It is highly likely that greg is gray, and Lily is a lion.
valid_hypothesis: Chances are slight that greg is gray, and Lily is a lion.
invalid_hypothesis: It is highly likely that greg is gray, and Lily is a lion.
hypothesis_assertion: Greg is gray, and Lily is a lion.