premise: A blond woman in a red t-shirt and a blur wristband sings into a microphone against a green background. hypothesis: A woman plays a mute in a movie.
contradiction: We can't assume that both women are blond and wearing a red t-shirt and blur wristband, and one sings with a green backround can not be the one who plays the mute in a movie. Also we can't assume that they both have the green backround.