As i understand it, this is your post in a nutshell.
We can't obtain true knowledge. Intelligence (being defined as the ability to acquire knowledge and skills) therefore, cannot exist for we would first have to be able to acquire (true) knowledge (which as was stated before is impossible). We, in essence, are computers "programmed" by our experiences and sensory experiences.
I know I'm just repeating what you said in a simpler form but I just want to make sure I'm not misunderstanding.
Now, the first thing I would like to bring up is what exactly do you define as "true knowledge"? Is it tied only into the physical world or can it exist in "our minds" so to speak? Does true knowledge dissipate the moment we experience it; for by the time we realize it, it is already an experience? I think a more clear representation of what true knowledge is should be established before anything.
Secondly, assuming that the definition above is an accurate representation of the word intelligence; do we need to acquire true knowledge? Can we simply acquire knowledge? Or does the fact that it's not true knowledge mean it can't be constituted as knowledge at all? If I say that I have intelligence because I have obtained knowledge, regardless off its validity, would I not meet the qualification for being intelligent?
Should I suppose that I can never have true knowledge, am I not obtaining the knowledge that I cannot obtain true knowledge? So would the statement "I can never obtain true knowledge" be false knowledge negating its validity?
If "I can never obtain true knowledge" is true knowledge. I have just obtained true knowledge, nullifying the statement.
On the flip side
If "I can never obtain true knowledge" is not true knowledge. The statement itself is no longer true and is thus nullified.
I'm currently taking a break from the HUGE project due in like 18 hours and don't have nearly enough sleep but I think my logic is sound. Then again, I'm tired as fuck.
Feel free to rip me a new one should I have made any mistakes.