expert tell you the correct answer but let the computer figure out the correct answer second is what we call meta supervision it's I'm not sure how standard this term is I think we might just have came up with it and the idea here is that you don't supervise the data the correct answer you supervise how the answer supposed to behave okay and finally if there is time I also want to mention a little bit about you know what if there is no correct answer what if you're just learning by just playing around you know if you don't have a goal