In such a case, the irrationalization of the evidence is impossible to overcome.
With creationists, evolution is like trying to convince someone that there is a connection between a light and the switch relative to evolution...you can flip the switch in front of them all day long and the light goes on and off, but, they can refutiate the connection between the light and the switch all day long since they can't see the wires in the wall...unfortunately, nobody wants to tear out the wall to show them the wires because it's too time consumming.