Cogito Quotes
One kind of person is engaged in society without realizing it; another kind engages in society by controlling it. The one is a gear, a cog, and the other an engineer, a driver. But a person who has opted out has only his ability to express his disengagement between his existence and nothingness. Not cogito, but scribo, ergo sum.
John Fowles
The hardship of it was a pleasure. Life was a pleasure; he looked back at its moments, many of them as shrouded in mist as the opposite bank of the Thames. Objectively, many of them held only misery, fear, confusion; but afterward, and even at the time, he had known an exhilaration stronger than the misery, fear, or confusion. A fragment of belief came to him from another epoch: Cogito ergo sum. For him that had not been true; his truth had been: Sentio ergo sum. I feel, so I exist. He enjoyed this fearful, miserable, confused life, and not only because it made more sense than nonlife. He could never explain that to anyone.
Brian Aldiss
There is ... no first person plural to the verb "cogito." Observation, verification, and inference are functions which are perfected only in their independent individual exercise. I am not unmindful of the importance of the corroboration of one mind by another; but such corroboration is valuable only in so far as both minds have reached their results alone. Corroboration implies the absence of collusion. The devotee of the intellect must, then, have the strength to work alone.
Ralph Barton Perry
Intelligence has two parts, which we shall call the epistemological and the heuristic. The epistemological part is the representation of the world in such a form that the solution of problems follows from the facts expressed in the representation. The heuristic part is the mechanism that on the basis of the information solves the problem and decides what to do.
[...]
The right way to think about the general problems of metaphysics and epistemology is not to attempt to clear one's own mind of all knowledge and start with 'Cogito ergo sum' and build up from there. Instead, we propose to use all of our knowledge to construct a computer program that knows. The correctness of our philosophical system will be tested by numerous comparisons between the beliefs of the program and our own observations and knowledge.
John McCarthy (computer scientist)