
https://www.amazon.com/Adams-Tongue-Humans-Made-Language-ebo...
Obviously pets are quite capable of making their wishes known to us, especially if we facilitate it. It's unclear whether they're actually achieving language. I'm tempted to think they are, especially when I see dogs using push buttons to talk to us on Instagram. But I can't be totally sure.
And even if they were, it would be language we taught them. Not independently developed in the wild.
https://www.amazon.com/Adams-Tongue-Humans-Made-Language-ebo...
The book Adam's Tongue delves into this. The author distinguishes "Animal Communication Systems" from languages by their linguistics. There are several things that you can isolate in human languages that you never see in animals, though some animals, like bees, come close.
Finally, he presents a hypothesis of how language might have evolved in humans in the context of savannah scavenging. The thinking goes that scavenging an elephant after it dies requires extremely rapid cooperation, because the window of opportunity is a few days at most.
My feeling is that you're never going to be able to find one thing that separates us from animals, that looking for that one thing is bound to fail.
http://www.amazon.com/Adams-Tongue-Humans-Made-Language/dp/0...
The book explains how our brains wouldn't really have the "thoughts" you speak of without having had language in the first place. I'm not sure precisely how this fits in to children who can't speak and who were never taught to sign, but my guess is it would introduce considerable mental stumbling blocks.
We know that communications overload reduces your IQ: http://www.businessweek.com/managing/content/sep2007/ca20070...
Of course, that's just e-mail at work. But the "dumbing-down" of IT, education and work in general is unlikely to increase our IQ.
Derek Bickerton, sometime co-author of the article's referenced William Calvin, believes that we may already be going the other way. In his book "Adam's Tongue" he points out how, over time, humans are becoming eerily similar to ants or termites, He also notes that it takes about 40 generations for a wolf to become a domesticated dog-like animal and that the caste system in India, which has probably been in place longer, may have left a permanent trace upon it's members.
