context: Chances are about even that Greg is a frog. We doubt that Mary went to the garden. Chances are slight that Julius is yellow.
hypothesis: It is certain that greg is a frog, and Mary went to the garden.
valid_hypothesis: There is little chance that greg is a frog, and Mary went to the garden.
invalid_hypothesis: It is certain that greg is a frog, and Mary went to the garden.
hypothesis_assertion: Greg is a frog, and Mary went to the garden.