context: It is unlikely that Lily is yellow. Chances are about even that Greg is a frog. We believe that John picked up the milk.
hypothesis: It is certain that greg is a frog, and Lily is yellow.
valid_hypothesis: There is little chance that greg is a frog, and Lily is yellow.
invalid_hypothesis: It is certain that greg is a frog, and Lily is yellow.
hypothesis_assertion: Greg is a frog, and Lily is yellow.