context: There is a very good chance that Sandra took the apple. We doubt that Mary left the milk. It is probably the case that Greg is gray. There is almost no chance that if either Sandra took the apple, or Greg is gray, then John put down the milk. It is improbable that if either Sandra took the apple, or Greg is gray, then Jeff moved to the office. It is unlikely that if Sandra took the apple, and Greg is gray, then Brian is a swan.
hypothesis: It is probably not the case that either Mary left the milk, or Brian is a swan.
valid_hypothesis: It is probably not the case that either Mary left the milk, or Brian is a swan.
invalid_hypothesis: We believe that either Mary left the milk, or Brian is a swan.
hypothesis_assertion: Either Mary left the milk, or Brian is a swan.