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LETTER

Dichotomous Disservice

right arrow Timothy G. Ferris, MD, MPhil

1 December 1997 | Volume 127 Issue 11 | Page 1044


TO THE EDITOR:

. Dr. Carleton's point on the obfuscation produced when complex natural phenomena are reduced to dichotomous classes is an important lesson [1]. I wonder, however, if we have an alternative. Anthropologists have long been aware that in every society studied, humans have a remarkably consistent tendency to think in small whole numbers [2, 3]. In fact, all classification systems (the way in which we order the world) require arbitrary distinctions in order for us to perform the logical operations we commonly call thinking. The example Dr. Carleton provides may illustrate this point. Would we not simply replace the dichotomy "Q wave/no Q wave" for some more accurate dichotomous distinction (or set of distinctions), such as "change in R/no change in R"? If so, I might then modify Dr. Carleton's opening line: Physicians, like all humans, often prefer to think dichotomously about phenomena that are clearly continua.


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Massachusetts General Hospital; Boston, MA 02114


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1. Carleton RA. Dichotomous disservice? Ann Intern Med. 1997; 126:589-91.

2. Needham R, ed. Right and Left: Essays in Dual Symbolic Classification. Chicago: Chicago Univ Pr; 1973.

3. Needham R. Essential perplexities. In: Circumstancial Deliveries. Berkeley, CA: Univ of California Pr; 1981.

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