In the great debate between Peirce and James, he sides with Peirce (whose papers he “lived with” for two years upon arrival at Harvard as a faculty member): “When we determine truth, we determine that which it is correct to believe and that upon which it is desirable (not merely desired) to act”. Lewis is dead set against the abandonment of evidence and reasons to the vagaries of wants and needs.

American Pragmatism and Indispensability Arguments