The question 'What is the criterion of identity for directions?' might be construed as asking either 'When do lines have the same direction?' or 'When are directions identical?'. Frege's answer 'When they are parallel' fits the former question, not the latter, for it specifies a relation other than identity between lines, not directions. Jonathan Lowe thinks the latter question more fundamental, and claims that Frege's criterion can be reformulated to answer it: 'When some line with one is parallel to some (...) line with the other'. At p. 147 of Identity and Discrimination I make three points against this view: Lowe's construal does not permit a principled rejection of an intuitively unacceptable answer to the original question, On pain of circularity, Lowe's answer uses conceptual resources beyond those of Frege's, and thus is not a mere reformulation, Lowe's question seems to make the hopeless demand for something more basic than 'x = y Lowe's reply 'One-level versus two-level identity criteria' does not address or . I shall follow him in discussing only. (shrink)

E. J. Lowe; One-level versus two-level identity criteria, Analysis, Volume 51, Issue 4, 1 October 1991, Pages 192–194, https://doi.org/10.1093/analys/51.4.192.

Preface and Acknowledgments Introduction PART I Intentionality Chapter 1 Fodor’ Guide to Mental Representation: The Intelligent Auntie’s Vade-Mecum Chapter 2 Semantics, Wisconsin Style Chapter 3 A Theory of Content, I: The Problem Chapter 4 A Theory of Content, II: The Theory Chapter 5 Making Mind Matter More Chapter 6 Substitution Arguments and the Individuation of Beliefs Chapter 7 Stephen Schiffer’s Dark Night of The Soul: A Review of Remnants of Meaning PART II Modularity Chapter 8 Précis of The Modularity of (...) Mind Chapter 9 Why Should the Mind Be Modular? Chapter 10 Observation Reconsidered Appendix: A Reply to Churchland’s ‘Perceptual Plasticity and Theoretical Neutrality" References Index of Names. (shrink)

This highly acclaimed book is a major contribution to the philosophy of language as well as a systematic interpretation of Frege, indisputably the father of ...