context: Chances are slight that John is in the garden. It is improbable that Greg is green. We believe that Mary put down the apple.
hypothesis: It is almost certain that mary put down the apple, and Greg is green.
valid_hypothesis: There is little chance that mary put down the apple, and Greg is green.
invalid_hypothesis: It is almost certain that mary put down the apple, and Greg is green.
hypothesis_assertion: Mary put down the apple, and Greg is green.