context: It is probably not the case that Sandra left the apple. It is almost certain that Lily is yellow. It is impossible that Greg is green. There is a very good chance that if Greg is green, and Lily is yellow, then Mary grabbed the milk. Chances are about even that if Sandra left the apple, or Greg is green, then Julius is white. It is highly unlikely that if Sandra left the apple, or Lily is yellow, then Fred went to the garden.
hypothesis: It is impossible that sandra left the apple, and Greg is green.
valid_hypothesis: It is impossible that sandra left the apple, and Greg is green.
invalid_hypothesis: It is highly likely that sandra left the apple, and Greg is green.
hypothesis_assertion: Sandra left the apple, and Greg is green.