"To avoid all metaphysical disputes about different degrees of consciousness; I desire it may be understood, that here and in other parts of this Essay, when I say we are not conscious of certain impressions made on the mind by the action of material causes on the organs of the body, I mean no more, than that we have no such consciousness or perception of them, as either convinces us of their existence when present, or enables us, by the help of memory, to recall them when past."
— Whytt, Robert (1714-1766)
(Sect XI, p. 287n)
Robert Whytt, An Essay on the Vital and Other Involuntary Motions of Animals (Edinburgh: Printed by Hamilton, Balfour, and Neill, 1751). <Link to Google Books>