context: It is highly unlikely that Bernhard is gray. It is probably the case that Greg is a rhino. There is almost no chance that Lily is a frog. It is highly unlikely that if either Bernhard is gray, or Lily is a frog, then Gertrude is a mouse. We believe that if either Bernhard is gray, or Greg is a rhino, then Jeff discarded the milk. Chances are about even that if Lily is a frog, and Bernhard is gray, then Sandra left the football.
hypothesis: There is almost no chance that greg is a rhino, and Jeff discarded the milk.
valid_hypothesis: Chances are about even that greg is a rhino, and Jeff discarded the milk.
invalid_hypothesis: There is almost no chance that greg is a rhino, and Jeff discarded the milk.
hypothesis_assertion: Greg is a rhino, and Jeff discarded the milk.