No More Learning

AN ELEMENTARY METHOD OF INQUIRY
From the Discourse on Method'
EEING that our
enses sometimes deceive us, I was willing to
suppose that there existed nothing really such as they pre-
sented to us; and because some men err in reasoning and
fall into paralogisms, even on the simplest matters of geometry,
I, convinced that I was as open to error as any other, rejected
as false all the reasonings I had hitherto taken for demonstra-
tions; and finally, when I considered that the very same thoughts
(presentations) which we           when awake may also be
experienced when we are asleep, while there is at that time not
one of them true, I supposed that all the objects (presentations)
that had ever entered into my mind when awake had in them
no more truth than the illusions of my dreams.