Something that ive been thinking about recently is what is known as our Inner Voice. We've all got one of course. You know, the voice you here in your head when you read, afer you've just been told not to read out loud, or the voice you here in your head when your sitting an exam. (obviously you cannot read quesions out loud in that situation). It would seem this voice is fundamentally important to human thinking, without it how would we think exactly.
Its the voice, and powerful thinking that has enabled us to build complex structures, or solve complicated equations, send rockets into space... the list goes on.
My point is, how would this apply to animals etc, obviously they do not have their own language like we do, and i really cannot imagine a dog for example, having an inner voice that barks.
This is the difference between us, and every other living creature. I really dont know how we could live the lives we do without thinking with our inner voice.
What do you think ?