  Colin McGinn has proposed the other new objection to coherentism. He argues (McGinn 2002: 195) that coherence theorists are committed to idealism. Like Thagard, he takes idealism to be obviously false, so the argument is a reductio. McGinn’s argument runs as follows. Coherentists are committed to the view that, for example, ‘Snow falls from the sky’ is true iff the belief that snow falls from the sky coheres with other beliefs. Now it follows from this and the redundancy biconditional (p is true iff p) that snow falls from the sky iff the belief that snow falls from the sky coheres with other beliefs. It appears then that the coherence theorist is committed to the view that snow could not fall from the sky unless the belief that snow falls from the sky coheres with other beliefs. From this it follows that how things are depends on what is believed about them. This seems strange to McGinn since he thinks, reasonably, that snow could fall from the sky even if there were no beliefs about snow, or anything else. The linking of how things are and how they are believed to be leads McGinn to say that coherentists are committed to idealism, this being the view that how things are is mind-dependent.