context: It is almost certain that Bernhard is green. It is probably the case that Sandra left the milk. Chances are slight that Julius is a lion. It is unlikely that if Bernhard is green, or Sandra left the milk, then Gertrude is a mouse. There is a very good chance that if Sandra left the milk, and Julius is a lion, then Mary went to the garden. It is certain that if Julius is a lion, or Bernhard is green, then Greg is a frog.
hypothesis: We believe that either Gertrude is a mouse, or Greg is a frog.
valid_hypothesis: We believe that either Gertrude is a mouse, or Greg is a frog.
invalid_hypothesis: There is little chance that either Gertrude is a mouse, or Greg is a frog.
hypothesis_assertion: Either Gertrude is a mouse, or Greg is a frog.