Why don't you establish a fact then explain how ape sperm miraculously produced a better and more intelligent version of itself repeatedly ending in modern human beings?
Wow, an easy one. Mutation, probably random in the majority of instances, and natural selection. The neccessary facts would be the observed prevalence of mutational events and the obvious operation of natural selection. Some evidence would be the comparative analysis of human and other primate genomes.
TTFN,
WK