classify it what basically that means is you cluster it right you put some of the data points in in the same clusters okay and then of course the data set I'm gonna draw the same data set right here the same data set would have an actual classification thing so this would be class zero this here maybe class one and this year might be class 2 now you can't possibly know how the classes are like called or something which one is the first which one is a second so at test time basically if you have a method like