premise: A group of Chinese people sitting and laying down together on what appears to be a front porch. hypothesis: A group of African American people are eating dinner at KFC.
contradiction: The group cannot consist of Chinese people and African American people simultaneously.  Also, they cannot be laying down on the front porch and eating dinner simultaneously.|contradiction: Chinese people are not called Americans, and they are not likely to be eating dinner while laying down.|contradiction: Chinese and African American are two different races.  KFC does not have a front porch.