premise: Two men paint a curb on a busy street corner. hypothesis: two girls play soccer on the sun.
contradiction: The two individuals can't be men and girls at the same time (could say there is a contradiction in age as well as gender). The activities of painting and playing soccer are different activities in themselves and are also different types of activities, painting being utilitarian and playing soccer is not utilitarian in nature. (I am assuming "on the sun" is meant to be "in the sun").