How did humans start speaking? One idea is that humans already had a language of thought (LOT). Perhaps this was perfectly developed in our heads (like a snowflake) before we really tried to communicate using language.
Do you think this is true? All humans have this perfectly formed LOT in their heads, and this LOT is basically the same for everyone. If it is true, how and why did human beings develop this thinking ability before other animals and before they could speak themselves?
Check out the slides here.