context: It is certain that Winona is a sheep. It is unlikely that Greg is a swan. We doubt that Bernhard is white.
hypothesis: There is a better than even chance that greg is a swan, and Bernhard is white.
valid_hypothesis: It is highly unlikely that greg is a swan, and Bernhard is white.
invalid_hypothesis: There is a better than even chance that greg is a swan, and Bernhard is white.
hypothesis_assertion: Greg is a swan, and Bernhard is white.