context: Chances are slight that Greg is a frog. It is highly unlikely that Brian is a rhino. We doubt that Gertrude is a mouse. Chances are slight that if Greg is a frog, and Gertrude is a mouse, then Julius is yellow. It is almost certain that if either Greg is a frog, or Brian is a rhino, then Bernhard is a swan. There is little chance that if Brian is a rhino, or Gertrude is a mouse, then Bill moved to the garden.
hypothesis: Chances are slight that brian is a rhino, or Greg is a frog.
valid_hypothesis: Chances are slight that brian is a rhino, or Greg is a frog.
invalid_hypothesis: We believe that brian is a rhino, or Greg is a frog.
hypothesis_assertion: Brian is a rhino, or Greg is a frog.