premise: We can see the white underwear of the man wearing the red soccer jersey because he is pulling up his shorts. hypothesis: People are not looking at underwear.
contradiction: If people are not looking, then they cannot also see the underware.|contradiction: how can people see the underwear if they are not looking.|contradiction: The people are either looking at the underwear of the man, or they are not, but they can't be doing both at the same time.