What if? Thought Experimentation in Philosophy

What If? begins by examining the nature of thought experiments. It presents an overview of how thought experiments have figured in natural science and in historical studies, before moving on to examine how they function as an instrument of philosophical inquiry. After examining thought experiments from the pre-Socratics to the present day, Rescher turns from history to analysis, and examines the modes of reasoning involved in the use of speculative hypotheses in philosophical problem solving.He shows the limitations of speculative ontology, showing that thought experimentation can lead readily to paradox in a way that increasingly diminishes its usefulness. The book concludes by arguing and illustrating how and when it becomes pointless to push speculation, or thought experimentation beyond the limits of intelligibility and cogent sense.