To conclude that a human equivalent AI is not possible,
let me bring into your attention the:
http://en.wikipedia.org/wiki/Dartmouth_ConferencesThe founding statement goes:
"that every aspect of learning or any other feature of intelligence can in principle be so precisely described that a machine can be made to simulate it."
A machine works in such way that it receives a particular input, which it had been programed to deal with and this results in a form of output.
Humans can create a machine to all of the inputs and their respective programmed outputs, that humans had ever received (inputs).
Just as much in the same way if un-modded torque has a brick placed in a brick, if forgets up, because it had not been programed to deal with such input. (may not be accurate)
So in the end humans are capable of creating human level AI, but if a new input is received the brain can handle it, sadly our AI friend cant.