Pragmatism as a broad, basic, and reductive view of knowledge is self-refuting and incoherent. If "truth is what is useful" or "what works," you face a self-refutation problem. If you claim something is just "useful" rather than objectively true, then it has no authority. If it is claimed as objectively true, it contradicts the pragmatic premise that truth isn't a relation to reality. And what is "useful", anyhow? Is usefulness useful?