Download or read book Empty Ideas written by Peter Unger and published by Oxford University Press. This book was released on 2017 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the middle of the twentieth century, philosophers generally agreed that, by contrast with science, philosophy should offer no substantial thoughts about the general nature of concrete reality. Instead, philosophers offered conceptual truths. It is widely assumed that, since 1970, things have changed greatly. This book argues that's an illusion that prevails because of the failure to differentiate between "concretely substantial" and "concretely empty" ideas.