context: There is a better than even chance that Greg is a lion. We doubt that John took the apple. It is improbable that Daniel left the football. Chances are about even that if either Greg is a lion, or John took the apple, then Julius is gray. It is improbable that if John took the apple, and Daniel left the football, then Bill went to the office. There is almost no chance that if John took the apple, or Greg is a lion, then Brian is a rhino.
hypothesis: It is certain that bill went to the office, or Brian is a rhino.
valid_hypothesis: There is almost no chance that bill went to the office, or Brian is a rhino.
invalid_hypothesis: It is certain that bill went to the office, or Brian is a rhino.
hypothesis_assertion: Bill went to the office, or Brian is a rhino.