context: It is likely that Greg is a frog. It is likely that John left the milk. There is little chance that Bernhard is gray. There is almost no chance that if either John left the milk, or Bernhard is gray, then Bill dropped the milk. It is unlikely that if John left the milk, or Greg is a frog, then Brian is gray. It is highly unlikely that if John left the milk, and Greg is a frog, then Mary went to the office.
hypothesis: There is almost no chance that mary went to the office, and Greg is a frog.
valid_hypothesis: There is almost no chance that mary went to the office, and Greg is a frog.
invalid_hypothesis: It is probable that mary went to the office, and Greg is a frog.
hypothesis_assertion: Mary went to the office, and Greg is a frog.