From: Robert Peter Burns <rburns-AT-scf.usc.edu> Subject: Re: Robert Burns and true contradictions Date: Sat, 25 Nov 1995 16:01:45 -0800 (PST) My thanks to Lorenzo for his post. I was too quick in making the principle of non-contradiction straight-off a normative principle, though this was due more to haste of expression than to not realizing the distinction. As one who is always arguing that normativity cannot be given an adequate reductionist treatment in terms of non-normative notions, I welcome Lorenzo's more precise formulation. As to the other matters Lorenzo raises, in particular, whether there can be true contradictions, I am skeptical on the grounds that deriving such contradictions always seems to require deliberately keeping indeterminate or ambiguous the meanings <what Frege would have called the "senses"> of the propositions involved, and I don't think that the principle of non-contradiction viewed as a normative principle was ever thought by its sophisticated proponents to say anything more than that where a proposition P has a determinate, non-vague, unambiguous sense, then it is illogical to violate the principle. Apparent counterexamples are really assertions of non-contradictory propositions in the disguise of contradictions--e.g. "it is cold <for this time of year>" and "it is not cold < relative to other times in the year>"; or else they are disguised assertions of the vagueness of a concept <and hence of the difficulty of determining its application in particular cases.>--e.g. "he is tall and he is not tall" ="it's not really clear whether we should say he is tall or not". If we all agree that "tall" only applies to human beings 6 feet tall or over, then the vagueness disappears. But we could stipulate this by convention--though it would be very inconvenient to do so systematically for a natural language. But it would not be an interesting position philosophically to rest one's case on problems that can be dissolved <even if only in theory> by convention. The possibility of true contradictions would only be interesting if there was no way to deal with apparent cases of the same by convention. I am sure Lorenzo has further ingenious thoughts on this matter, but I will take some convincing that we should give up thinking of the principle of non-contradiction as a norm of rational belief. Peter rburns-AT-scf.usc.edu PS--Lorenzo, I am working at present on a post on scientism and Marxism that may be of interest to you at least, if not to others, when it appears in a day or so. --- from list marxism-AT-lists.village.virginia.edu --- ------------------
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