context: It is unlikely that Greg is a frog. It is almost certain that Bernhard is a rhino. We believe that Mary got the apple.
hypothesis: Chances are slight that mary got the apple, and Greg is a frog.
valid_hypothesis: Chances are slight that mary got the apple, and Greg is a frog.
invalid_hypothesis: We believe that mary got the apple, and Greg is a frog.
hypothesis_assertion: Mary got the apple, and Greg is a frog.