In science, a theory is a proposed description, explanation, or model of the manner of interaction of a set of natural phenomena, capable of predicting future occurrences or observations of the same kind, and capable of being tested through experiment or otherwise falsified through empirical observation. Falsifiable does not mean false. For a proposition to be falsifiable, it must be possible in principle to make an observation that would show that the proposition was false, even if that observation is not actually made. Using the most basic understanding of the scientific definition for a theory, the idea that human beings evolved from apes over a long period of time, the evolutionist has been unable to observe, record, or test through experiment that this theory is possible.
As a result scientist who support evolution resort to ad hoc hypothesis in order to defend the theory of evolution, due to evolution being unable to be justified under the basic scientific definitions of what qualifies to be a theory.
Slowly But Surely
Darwin's Theory of Evolution is a slow gradual process. Darwin wrote, "Natural selection acts only by taking advantage of slight successive variations; she can never take a great and sudden leap, but must advance by short and sure, though slow steps."  Thus, Darwin conceded that, "If it could be demonstrated that any complex organ existed, which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down."  Such a complex organ would be known as an "irreducibly complex system". An irreducibly complex system is one composed of multiple parts, all of which are necessary for the system to function. If even one part is missing, the entire system will fail to function. Every individual part is integral.  Thus, such a system could not have evolved slowly, piece by piece. The common mousetrap is an everyday non-biological example of irreducible complexity. It is composed of five basic parts: a catch (to hold the bait), a powerful spring, a thin rod called "the hammer," a holding bar to secure the hammer in place, and a platform to mount the trap. If any one of these parts is missing, the mechanism will not work. Each individual part is integral. The mousetrap is irreducibly complex.  The missing link between man and ape is an example of a part missing in the theory of evolution!
A Theory In Crisis
Darwin's Theory of Evolution is a theory in crisis in light of the tremendous advances we've made in molecular biology, biochemistry and genetics over the past fifty years. We now know that there are in fact tens of thousands of irreducibly complex systems on the cellular level. Specified complexity pervades the microscopic biological world. Molecular biologist Michael Denton wrote, "Although the tiniest bacterial cells are incredibly small, weighing less than 10-12 grams, each is in effect a veritable micro-miniaturized factory containing thousands of exquisitely designed pieces of intricate molecular machinery, made up altogether of one hundred thousand million atoms, far more complicated than any machinery built by man and absolutely without parallel in the non-living world." 
Even if you are not a Christian or person of faith it is impossible to negate the scientific advances in molecular biology, biochemistry and genetics which consequently render the science of evolution as worthless. As for attempts to literally bring evolutionist or atheist out of the "caveman" mentality, I believe this is only something God can do and just like God has his warriors, unfortunately the Adversary has his as well!
Jonathan R. Burrs