Listening to conversations and learning how they flow is only one aspect of language learning. What these things are missing is the interactive part. Next gener

Listening to conversations and learning how they flow is only one aspect of language learning. What these things are missing is the interactive part. Next generation systems need to be able to form hypotheses about what appropriate responses should be, try out various responses and then see what the results are. They can only learn so much from passive consumption of training sets, so I agree this approach is going to hit a wall of diminishing returns.