the machine to predict the words that are missing in the process of doing so the machine has to basically develop a representation of language that this allows it to make those predictions and basically in the process of doing this it kind of understands language not completely not deeply but but still but really more generally is the idea of taking a piece of data and asking the machine to predict a piece of it from the piece that it sees so as I just mentioned this type of learning is extremely has become in the last year