prerational en · ADJ
Etymology
From pre- + rational.
Meanings
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(not-comparable) Before the application of reason.
It is hard to escape the impression that if retailers could they would find some way to hook up directly to the prerational brain — the part of us that knows nothing about common sense, budgets, late fees and interest rates — a part of the brain to which, for many of us, our cellphones have constant access.
2007 October 7, “Can I Put You on Hold?”, in New York Times: