context: There is a very good chance that Greg is a rhino. It is likely that John picked up the milk. There is a better than even chance that Bernhard is a frog. It is impossible that if Greg is a rhino, and Bernhard is a frog, then Brian is green. It is impossible that if either Greg is a rhino, or John picked up the milk, then Mary moved to the office. It is probably the case that if either Greg is a rhino, or Bernhard is a frog, then Julius is yellow.
hypothesis: Chances are about even that john picked up the milk, and Bernhard is a frog.
valid_hypothesis: Chances are about even that john picked up the milk, and Bernhard is a frog.
invalid_hypothesis: It is impossible that john picked up the milk, and Bernhard is a frog.
hypothesis_assertion: John picked up the milk, and Bernhard is a frog.