context: It is highly unlikely that Greg is white. Chances are about even that Sandra took the football. We believe that Mary went to the garden. There is a better than even chance that if Mary went to the garden, or Sandra took the football, then Bill moved to the office. It is probable that if Mary went to the garden, or Sandra took the football, then John put down the apple. We doubt that if Sandra took the football, or Mary went to the garden, then Gertrude is a wolf.
hypothesis: It is highly unlikely that greg is white, and Mary went to the garden.
valid_hypothesis: It is highly unlikely that greg is white, and Mary went to the garden.
invalid_hypothesis: We believe that greg is white, and Mary went to the garden.
hypothesis_assertion: Greg is white, and Mary went to the garden.