 The main objection that coherentists have to answer has been called “the isolation objection”. The objection centers on the fact that, according to the coherentist, the justification of a system of beliefs is entirely a matter of relations among the beliefs constituting the system. But this runs against the strong intuition that experience has a very important role to play in the justification of beliefs. To illustrate the problem, suppose that you and I both have a highly coherent set of beliefs—your system, it is safe to assume, contains the belief that you are reading, whereas mine doesn’t, and it contains instead the belief that I am swimming (because, let us suppose, I am swimming right now). Suppose now that we switch systems of beliefs—somehow, you come to have my set of beliefs and I come to have yours. Given that coherence is entirely a matter of relations among beliefs, your system will be as coherent in my mind as it was in yours, and vice-versa. And yet, our beliefs are now completely unjustified—there you are, reading, believing that you are swimming, and here I am, swimming, believing that I am reading. In other words, certain transformations that preserve coherence in a system of beliefs do not seem to preserve justification.