> > Two big differences: > > 1. Natural languages arose naturally, they weren't artificially > > constructed. > > This is so, but I hardly see the relevance to this discussion. Relevance is that there may be something about natlangs that make them learnable that we may have missed out of our conauxlangs. That is the Chomskyan view anyway. I'm not saying I necessarily believe it, but it's an open question.