Previsivelmente irracional?

But if we really are “predictably irrational”, why does this behaviour persist? Perhaps evolution is smarter than the authors of these books.

(…) These demonstrations of our supposed irrationality mostly involve artificial situations – the helicopter pilot without a chart, the phrase deliberately framed to mislead – in which sensible, practical rules that we use to get through the complexities of everyday life give misleading answers.
(…) A cheery disposition is often objectively unjustified, but makes life better. If irrationality is predictable, it probably isn’t irrational.

There are sensible reasons for irrational behaviour, Financial Times 27 August 2008, John Kay