context: It is unlikely that John put down the apple. Chances are about even that Greg is a swan. It is likely that Lily is gray.
hypothesis: It is impossible that greg is a swan, or John put down the apple.
valid_hypothesis: There is a better than even chance that greg is a swan, or John put down the apple.
invalid_hypothesis: It is impossible that greg is a swan, or John put down the apple.
hypothesis_assertion: Greg is a swan, or John put down the apple.