Here a question to trump JWs.
Where was the Larynx located in Neanderthal Man if Neanderthals were as capable of speech as you and I were?
If they say that the larynx would be located in the same place as a modern human.
Say`you are saying that Neanderthal Man was a monster with his larynx located in his chest'.
cf.Eve Spoke,pp93-94