Abstract
Debates between different kinds of scientific realists and antirealists are longstanding and show every sign of continuing. In this chapter I examine one explanation of their longevity: lurking beneath various forms of realism and antirealism are conflicting commitments which (1) sustain these positions and (2) are immune to refutation. These deeper commitments are to different epistemic stances. I consider the nature of philosophical stances generally and, more specifically, of epistemic stances in relation to the sciences. I investigate the question of how stances are evaluated and adopted, and elaborate on the most telling reason for their immunity, namely a form of voluntarism regarding their adoption.