Are you saying that a sufficiently advanced version of sentence continuation is indiscernible from actual understanding? He isn't saying sentence completion is

Are you saying that a sufficiently advanced version of sentence continuation is indiscernible from actual understanding? He isn't saying sentence completion is what keeps LLMs from understanding, he saying that's all they do (regardless of how advanced it is), and that isn't enough. You also need a body with senses and organs that produce a physiological response to emotions, and emotions are necessary for consciousness.