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2 Libertarian Papers 1 (2010)
Two Concepts of Rationality

handle is hein.journals/libpa2 and id is 53 raw text is: VOL. 2, ART. No. 5 (2010)

TWO CONCEPTS OF RATIONALITY
DANNY FREDERICK
1. Introduction
no Person can disobey Reason, without giving up his Claim to be a rational Creature
-Swift (1726, 261)
RATIONALITY IS ESSENTIALLY connected with norms. In Western
philosophy, while there has been much disagreement over what the norms of
rationality are, there seems to have been substantial agreement that these
norms are narrowly prescriptive; in fact there is a pronounced tendency to
see rationality as leaving the agent no scope for choice in matters of thought,
belief, inference and behaviour. On this pervasive view, rationality dictates:
either one accepts, believes, infers or does what rationality says one should,
or one is irrational. I will argue that this authoritarian concept of rationality is
absurd. I contrast it with a libertarian concept of rationality, derived from the
critical rationalism of Karl Popper. I argue that, while this approach avoids
the absurdities of the authoritarian one, it requires some further
development. To keep the discussion within a reasonable compass, after
outlining the two concepts with regard to both theoretical and practical
rationality, I discuss them critically with respect to theoretical rationality only;
the comparison with respect to practical rationality is left for another
occasion. However, as the distinction between theoretical and practical
rationality is somewhat artificial, parts of the following discussion will
inevitably cross over into some matters of practical rationality.
It would be impossible, as well as tiresome, to consider here every
species within the authoritarian genus, so I will outline the full-blown
authoritarian approach and illustrate it with a few examples from
contemporary philosophy. I am challenging the underlying principles of that
approach, so the application of my critique to other examples should be
*Danny Frederick (danny.frederick(Wbtinternet.com) is an independent researcher.
CITE THIS ARTICLE AS: Danny Frederick, Two Concepts of Rationality, Libertarian
Papers 2, 5 (2010). ONLINE AT: libertarianpapers.org. THIS ARTICLE IS subject to a Creative
Commons Attribution 3.0 License (creativecommons.org/icenses).

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LIBERTARIAN PAPERS

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