This is not necessarily true. We probably do know how speech in humans evolved as organs in the brain, but there would be stages in that evolution which can be partially described already. The Neanderthals, by that analysis, probably could speak to themselves but perhaps not with the fidelity that humans can in terms of brain to brain communication. Furthermore, it is probable that some humans could translate Neanderthal speech even if Neanderthals might not be able to correctly translate Human speech. As a kind of proof of this you can just watch animals of a species communicating among themselves and humans in dialogue with other humans determining (i.e., confirming scientifically) what the animals might be saying to each other. Exactly what can be communicated among humans, including individual humans and 'subspecies', is not well understood because no one wants to fund such research. The knowledge could be very disappointing. Sadly linguists are not trained in computation and computation people (AI) are not trained in linguistics. So when a linguist makes an observation that he thinks is good is useless to a computation guy, and vice versa. That said, studying lying and deceit is a good place to start. Sign up for TruthCourt.Net and find out. It's free and sometimes you can be paid for your insights. Mendaciology:
