context: Chances are slight that Brian is a rhino. There is a very good chance that Mary took the apple. There is little chance that Bernhard is white. We believe that if either Brian is a rhino, or Mary took the apple, then Fred left the football. It is probably the case that if either Brian is a rhino, or Bernhard is white, then John dropped the apple. It is likely that if either Mary took the apple, or Brian is a rhino, then Greg is green.
hypothesis: It is almost certain that greg is green, and John dropped the apple.
valid_hypothesis: It is highly unlikely that greg is green, and John dropped the apple.
invalid_hypothesis: It is almost certain that greg is green, and John dropped the apple.
hypothesis_assertion: Greg is green, and John dropped the apple.