context: It is almost certain that Gertrude is a mouse. It is impossible that Greg is gray. It is probable that Julius is a frog. It is certain that if Greg is gray, and Gertrude is a mouse, then Mary went to the bedroom. It is certain that if either Greg is gray, or Gertrude is a mouse, then Lily is a lion. It is almost certain that if either Julius is a frog, or Greg is gray, then Brian is yellow.
hypothesis: It is likely that greg is gray, and Brian is yellow.
valid_hypothesis: It is impossible that greg is gray, and Brian is yellow.
invalid_hypothesis: It is likely that greg is gray, and Brian is yellow.
hypothesis_assertion: Greg is gray, and Brian is yellow.