context: It is improbable that Greg is a frog. It is unlikely that John got the apple. It is certain that Sandra left the milk.
hypothesis: It is impossible that either Greg is a frog, or Sandra left the milk.
valid_hypothesis: It is highly likely that either Greg is a frog, or Sandra left the milk.
invalid_hypothesis: It is impossible that either Greg is a frog, or Sandra left the milk.
hypothesis_assertion: Either Greg is a frog, or Sandra left the milk.