context: It is certain that Winona is a mouse. There is little chance that Bernhard is green. Chances are slight that Fred left the milk. It is unlikely that if either Bernhard is green, or Winona is a mouse, then Julius is a frog. It is almost certain that if Winona is a mouse, or Bernhard is green, then Mary went to the hallway. Chances are about even that if Bernhard is green, or Winona is a mouse, then Brian is a rhino.
hypothesis: It is probably the case that fred left the milk, and Julius is a frog.
valid_hypothesis: There is almost no chance that fred left the milk, and Julius is a frog.
invalid_hypothesis: It is probably the case that fred left the milk, and Julius is a frog.
hypothesis_assertion: Fred left the milk, and Julius is a frog.