context: Chances are about even that Greg is a swan. Chances are slight that Bernhard is a frog. Chances are about even that Mary grabbed the apple.
hypothesis: It is highly unlikely that either Greg is a swan, or Mary grabbed the apple.
valid_hypothesis: Chances are about even that either Greg is a swan, or Mary grabbed the apple.
invalid_hypothesis: It is highly unlikely that either Greg is a swan, or Mary grabbed the apple.
hypothesis_assertion: Either Greg is a swan, or Mary grabbed the apple.