On compatibility between realism and fictionalism: A response to Suárez' proposal

In a series of articles, Mauricio Suárez defends the neutrality of fictionalism with respect to the scientific realism-anti-realism debate. Suárez understands fictionalism from a strictly methodological point of view, linked to the practice of model building in the context of the philosophy of science. He moves away from the type of fictionalism analysed in other areas of philosophy such as metaphysics, the philosophy of language, aesthetics or the philosophy of mathematics. Following Vaihinger's position, he emphasizes the inferential role of fiction in scientific modelling and argues that scientific fictionalism is not incompatible with scientific realism, as is often believed. We argue against Suárez's position and reject the ubiquitous character assigned to fictions in scientific discourse, as well as the deflationary view of scientific realism defended by Suárez. We conclude that when the semantic, epistemic, and metaphysical aspects at stake in the realism-antirealism debate are taken into account, the alleged compatibility between scientific realism and fictionalism starts to generate some tension.