Part of speech:
n. The part of speech reflects that used in the
full entry, and not necessarily the part of speech as it is used in the quotation below.
Quotation: What caused most apprehension, however, was what aircraft designers refer to as the “unk-unks,” the unknown-unknowns, the problems you cannot anticipate because you don’t even know they exist.
Author:
Robert J. Thomas
Date of publication:
Mar. 1, 1994
Page number:
149
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