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9358
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There are several logics, none of which will ever derive falsehoods from truth [Lewis,CI]
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Full Idea:
The fact is that there are several logics, markedly different, each self-consistent in its own terms and such that whoever, using it, avoids false premises, will never reach a false conclusion.
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From:
C.I. Lewis (A Pragmatic Conception of the A Priori [1923], p.366)
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A reaction:
As the man who invented modal logic in five different versions, he speaks with some authority. Logicians now debate which version is the best, so how could that be decided? You could avoid false conclusions by never reasoning at all.
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9357
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Excluded middle is just our preference for a simplified dichotomy in experience [Lewis,CI]
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Full Idea:
The law of excluded middle formulates our decision that whatever is not designated by a certain term shall be designated by its negative. It declares our purpose to make a complete dichotomy of experience, ..which is only our penchant for simplicity.
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From:
C.I. Lewis (A Pragmatic Conception of the A Priori [1923], p.365)
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A reaction:
I find this view quite appealing. 'Look, it's either F or it isn't!' is a dogmatic attitude which irritates a lot of people, and appears to be dispensible. Intuitionists in mathematics dispense with the principle, and vagueness threatens it.
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9365
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We can maintain a priori principles come what may, but we can also change them [Lewis,CI]
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Full Idea:
The a priori contains principles which can be maintained in the face of all experience, representing the initiative of the mind. But they are subject to alteration on pragmatic grounds, if expanding experience shows their intellectual infelicity.
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From:
C.I. Lewis (A Pragmatic Conception of the A Priori [1923], p.373)
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A reaction:
[compressed] This simply IS Quine's famous 'web of belief' picture, showing how firmly Quine is in the pragmatist tradition. Lewis treats a priori principles as a pragmatic toolkit, which can be refined to be more effective. Not implausible...
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24008
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Reference to a person's emotions is often essential to understanding their actions [Williams,B]
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Full Idea:
The reference to a man's emotions has a significance for our understanding of his moral sincerity, not as a substitute for or addition to how he acts, but as, on occasion, underlying our understanding of how he acts.
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From:
Bernard Williams (Morality and the emotions [1965], p.223)
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A reaction:
Williams aims to rescue emotion from the emotivists, and replace it at the centre of traditional modes of moral judgement. I suppose we could assess one rogue robot as behaving 'badly' in a community of robots.
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24009
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Moral education must involve learning about various types of feeling towards things [Williams,B]
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Full Idea:
If moral education does not revolve around what to fear, to be angry about, to despise, and where to draw the line between kindness and a stupid sentimentality - I do not know what it is. (Though there are principles, of truth-telling and justice).
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From:
Bernard Williams (Morality and the emotions [1965], p.225)
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A reaction:
He cites Aristotle as the obvious source of this correct idea. The examples of principle both require us to place a high value on truth and justice, and not just follow rules in the style of arithmetic.
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24012
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Kant's love of consistency is too rigid, and it even overrides normal fairness [Williams,B]
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Full Idea:
There is a certain moral woodenness or even insolence in Kant's blank regard for consistency. It smacks of Keynes's Principle of Unfairness - that if you can't do a good turn to everybody, you shouldn't do it to anybody.
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From:
Bernard Williams (Morality and the emotions [1965], p.226)
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A reaction:
He says it also turns each of us into a Supreme Legislator, which deifies man. It is clearly not the case that morality consists entirely of rules and principles, but Williams recognises their role, in truth-telling for example.
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9363
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Science seeks classification which will discover laws, essences, and predictions [Lewis,CI]
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Full Idea:
The scientific search is for such classification as will make it possible to correlate appearance and behaviour, to discover law, to penetrate to the "essential nature" of things in order that behaviour may become predictable.
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From:
C.I. Lewis (A Pragmatic Conception of the A Priori [1923], p.368)
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A reaction:
Modern scientific essentialists no longer invoke scare quotes, and I think we should talk of the search for the 'mechanisms' which explain behaviour, but Lewis seems to have been sixty years ahead of his time.
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