Silicon used for making computer chips must be pure to something like 12 decimal places (99.999 999 999 999% pure). When I was in college taking physical electronics (dealung with a lot of quantum theory) one of the excercises was to see what effect contamination of one part in a BILLION would make. The result was that it would basically render the batch unuseable.
I suspect that 4% difference between chimps and humans is MUCH more than they are willing to admit. Literally it is the difference between constructin a vessel that will take men to the moon and back and swinging in trees and then picking fleas off each other's back (sorry if I offended tre swinging, flea picking 'Rats).
Do not be so confident. There are indirect ways of raising chimps to higher linguistic levels, like genetically lengthening their adolescence. You don't have to be able to understand or engineer even 10% of that 4% to make some serious monkey business.