context: It is probably the case that Greg is a rhino. There is a very good chance that Daniel left the apple. Chances are about even that Bill got the milk there. Chances are slight that if Bill got the milk there, or Greg is a rhino, then Gertrude is a mouse. It is probably not the case that if Greg is a rhino, and Bill got the milk there, then John went to the garden. It is probably not the case that if Bill got the milk there, or Daniel left the apple, then Julius is gray.
hypothesis: It is probable that either John went to the garden, or Gertrude is a mouse.
valid_hypothesis: It is unlikely that either John went to the garden, or Gertrude is a mouse.
invalid_hypothesis: It is probable that either John went to the garden, or Gertrude is a mouse.
hypothesis_assertion: Either John went to the garden, or Gertrude is a mouse.