Combining Texts

All the ideas for 'works', 'On the spiritual perfection of life' and 'Morals and Modals'

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4 ideas

2. Reason / C. Styles of Reason / 1. Dialectic

22102	Arguing with opponents uncovers truths, and restrains falsehoods [Aquinas]
	Full Idea: There is no better way of uncovering the truth and keeping falsity in check than by arguing with people who disagree with you.
	From: Thomas Aquinas (On the spiritual perfection of life [1268], 26), quoted by Kretzmann/Stump - Aquinas, Thomas 05
	A reaction: Not the sort of attitude you associate with medieval scholastics, who are presumed to be dogmatists. How many modern philosophers actually have the courage to follow this advice?

5. Theory of Logic / D. Assumptions for Logic / 3. Contradiction

10121	Contradiction is not a sign of falsity, nor lack of contradiction a sign of truth [Pascal]
	Full Idea: Contradiction is not a sign of falsity, nor the lack of contradiction a sign of truth.
	From: Blaise Pascal (works [1660]), quoted by A.George / D.J.Velleman - Philosophies of Mathematics Ch.6
	A reaction: [Quoted in Auden and Kronenberger's Book of Aphorisms] Presumably we would now say that contradiction is a purely formal, syntactic notion, and not a semantic one. If you hit a contradiction, something has certainly gone wrong.

10. Modality / C. Sources of Modality / 1. Sources of Necessity

14629	If we are told the source of necessity, this seems to be a regress if the source is not already necessary [Blackburn]
	Full Idea: If we ask why A must be the case, and A is then proved from B, that explains it if B must be so. If the eventual source cites some truth F, then if F just is so, there is strong pressure to feel that the original necessity has not been explained.
	From: Simon Blackburn (Morals and Modals [1987], 1)
	A reaction: [compressed] Ross Cameron wrote a reply to this which I like. I'm fishing for the idea that essence is the source of necessity (as Kit Fine says), but that essence itself is not necessary (as only I say, apparently!).

14529	If something underlies a necessity, is that underlying thing necessary or contingent? [Blackburn, by Hale/Hoffmann,A]
	Full Idea: Blackburn asks of what theorists propose as underlying the necessity of a proposition, the question whether they themselves are conceived as obtaining of necessity or merely contingently.
	From: report of Simon Blackburn (Morals and Modals [1987], p.120-1) by Bob Hale/ Aviv Hoffmann - Introduction to 'Modality' 1
	A reaction: I've seen a reply to this somewhere: I think the thought was that a necessity wouldn't be any less necessary if it had a contingent source, any more than the father of a world champion boxer has to be a world champion boxer.