context: It is probably the case that Lily is green. Chances are about even that Mary went to the office. It is improbable that Greg is a frog. There is little chance that if Greg is a frog, or Mary went to the office, then John took the apple. We believe that if Greg is a frog, or Lily is green, then Julius is a swan. We doubt that if Mary went to the office, or Lily is green, then Bernhard is a lion.
hypothesis: There is little chance that either John took the apple, or Greg is a frog.
valid_hypothesis: There is little chance that either John took the apple, or Greg is a frog.
invalid_hypothesis: It is almost certain that either John took the apple, or Greg is a frog.
hypothesis_assertion: Either John took the apple, or Greg is a frog.