context: We doubt that Greg is yellow. There is little chance that Lily is white. It is impossible that Gertrude is a mouse. It is almost certain that if Lily is white, and Gertrude is a mouse, then Daniel left the football. It is probable that if Greg is yellow, or Lily is white, then John moved to the garden. It is likely that if either Gertrude is a mouse, or Lily is white, then Julius is gray.
hypothesis: Chances are about even that julius is gray, and Gertrude is a mouse.
valid_hypothesis: It is impossible that julius is gray, and Gertrude is a mouse.
invalid_hypothesis: Chances are about even that julius is gray, and Gertrude is a mouse.
hypothesis_assertion: Julius is gray, and Gertrude is a mouse.