Amazon Review: How We Know

I posted a brief review of Harry Binswanger's new book on Amazon.Com.

Harry Binswanger is a philosopher who was associated with Ayn Rand in her later life. This is his long awaited book on epistemology written from the perspective of Rand's philosophy of Objectivism. It covers most of the major topics in epistemology, including some that Rand didn't comment on, such as propositions.

Generally speaking, I enjoyed this book. Although Binswanger is a rather dogmatic Objectivist, the tone is surprisingly mild. More than the typical Objectivist he tries to understand the ideas with which he disagrees and present them in a fair manner.

The heart of the book is an exposition of Rand's theory of concept formation, which her acolytes consider her greatest achievement. She developed an elaborate theory of "measurement omission" in her Introduction to Objectivist Epistemology. I'm not persuaded that all concepts are formed on the basis of measurement omission (what measurements are omitted when we form the concept "justice"?), but Binswanger makes a decent effort. Unfortunately, he presents no evidence that the Objectivist theory of concepts is true. I'd like to see the psychological studies that adults (much less children) form concepts the way Rand and Binswanger claim. Indeed I suspect that we often form concepts without having two or more examples and a "foil." If I'm wandering in Borneo and see an animal that no one has seen before, do I need to see another one to conceptualize it?

On the negative side, Binswanger appears to believe the urban legend that people in the Middle Ages thought the world was flat. I was surprised that he doesn't mention David Kelley's The Evidence of the Senses, an important Objectivist work on epistemology