Is Reality Rational?

Is reality rational or is it perhaps that humans project their need to grasp and manipulate reality, using their finite methods, onto a reality that is spiritual and not rational?

Is believing in miracles irrational?

Well, what is a miracle but any aspect of reality that we cannot understand how it works?

If a modern i-pad was brought back to the time of the cavemen how would they view that gadget? Wouldn't they view it as a miracle? And wouldn't they label as irrational or crazy one who actually saw said i-pad and went around claiming that he saw it?