Abstract

The main purpose of this paper is to seek a reconciliation between two apparently conflicting views of mine. I have argued (for example, Smart, 1963) for realism about theoretical entities, for example electrons, protons, photons, possibly space-time points, perhaps the ‘Y’-wave of Schrödinger’s equation and so on. Quine has also plausibly argued that we should believe in mathematical entities, since in physics we quantify over them no less than over electrons and protons. I except cases in which in physics the existential quantifications are part of merely pretence discourse. Perhaps in spherical astronomy talk of the celestial sphere should be treated in this way. Alternatively the celestial sphere could be thought of realistically as a sphere whose centre is that of the earth while the stars and planets are thought of (or correlated with) points or small areas on the sphere’s surface in their lines of sight. I am not concerned in this paper to delimit fact from fiction in scientific discourse. The settlement of borderline disputes can wait for another occasion. My main argument for scientific realism is the cosmic coincidence argument. Would it not be a cosmic coincidence if the world were merely as if there were electrons, protons, etc?1.