context: We believe that Lily is green. It is improbable that Greg is yellow. It is almost certain that Brian is white.
hypothesis: It is improbable that greg is yellow, and Brian is white.
valid_hypothesis: It is improbable that greg is yellow, and Brian is white.
invalid_hypothesis: It is probably the case that greg is yellow, and Brian is white.
hypothesis_assertion: Greg is yellow, and Brian is white.