context: It is probably the case that Lily is white. It is probably not the case that Greg is white. There is a very good chance that Julius is green.
hypothesis: We doubt that greg is white, and Lily is white.
valid_hypothesis: We doubt that greg is white, and Lily is white.
invalid_hypothesis: It is probably the case that greg is white, and Lily is white.
hypothesis_assertion: Greg is white, and Lily is white.