context: Chances are about even that Bernhard is white. It is likely that John went to the office. It is certain that Greg is a frog. There is little chance that if John went to the office, or Bernhard is white, then Sandra grabbed the milk. It is highly unlikely that if John went to the office, and Greg is a frog, then Julius is a rhino. It is improbable that if Bernhard is white, or John went to the office, then Brian is gray.
hypothesis: It is highly unlikely that bernhard is white, and Greg is a frog.
valid_hypothesis: Chances are about even that bernhard is white, and Greg is a frog.
invalid_hypothesis: It is highly unlikely that bernhard is white, and Greg is a frog.
hypothesis_assertion: Bernhard is white, and Greg is a frog.