A Game of Perspectives: On the Role of Imagination in Thought Experiments

Thought experiments are fictional narratives that widen our cognitive horizons both in the sciences and in philosophy. In the present paper we argue that they can perform this function by bringing one’s perspective into view. Despite being traditionally conceived as devices that transmit true propositions to their readers, thought experiments are also particularly apt to express a specific theoretical perspective through the use of imagination. We suggest that this is a significant epistemic feature that is often overlooked in the debate. After presenting our analysis of thought experiments (Section 2) and of the role that imagination plays in them (Section 3), we revisit Galileo Galilei’s use of imaginary cases in light of our account (Section 4). We show that the main aims of Galileo’s thought experiments are to highlight how different perspectives endorsed by fictional characters affect imagination and to invite readers to actively engage in perspectives that are different from their own. This results in a clash of perspectives which plays a crucial epistemic role (Section 5). Readers of thought experiments do not passively absorb information, but critically assess the other’s perspective. In the final part of the paper, we individuate different ways in which readers can react to thought experiments.