I'll tell you exactly what it is. It's pure bullsh*t.
It's man's feeble stab at pretending that he is knowledgable about that which he knows absolutely nothing. It is an attempt to justify his existence while leaving God and his miracles out of the equation.
It is a one way ticket to Hell for those who believe they can't afford Heaven.
You must be fully conversant with it to dismiss it with such vigor. Would you care to state the theory?
For example, I posted a definition of evolution and a statement of the theory in post 1644. Would you agree that what I posted accurately reflects the theory? If not, which part of that post is wrong?