sound and negatives are videos with a wrong sound of sound from some other video for example okay and then we train this classifier and hopefully it will learn to to figure out that the correct sound correct video correct sound there is a correspondence okay this unfortunately doesn't work well at all and the reason it doesn't work well at all is because again it's a problem of cheating because if you have if you take a random video and a random audio the video could be me giving a talk and the audio could be you know