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James Jurin Awakens Hume from His Dogmatic Slumber. With a Short Tract on Visual Acuity
- Hume Studies
- Hume Society
- Volume 32, Number 1, April 2006
- pp. 141-166
- 10.1353/hms.2011.0320
- Article
- Additional Information
After a discourse about the literature on visual acuity before Hume, I discuss how the "size" of visual objects is defined and determined. I shall then present circumstantial, but commanding, evidence for the influence of James Jurin's Essay upon Distinct and Indistinct Vision on Hume's thought. This work contains well-supported findings incompatible with claims made in T 1.2, "Of the ideas of space and time," and elsewhere. Specifically, the prominent principle of the Treatise, "[w]hat consists of parts is distinguishable into them, and what is distinguishable is separable" (T 1.2.1.3; SBN 27) is shown to be false. A powerful principle, it is a premise to the most important arguments of the Treatise, but is shunned in the Enquiry and later writings because, I believe, Hume had read Jurin.