context: We believe that Brian is white. It is certain that Mary put down the apple. It is probably the case that Greg is green.
hypothesis: It is likely that greg is green, and Mary put down the apple.
valid_hypothesis: It is likely that greg is green, and Mary put down the apple.
invalid_hypothesis: It is highly unlikely that greg is green, and Mary put down the apple.
hypothesis_assertion: Greg is green, and Mary put down the apple.