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Zen: the sound of the ax chopping. Chopping
logic.
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-Edward Abbey
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The logic of words should yield to the logic
of realities.
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-Louis Brandeis
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*Not to draw a
conclusion, in some cases, is as much a breach of correct reasoning as it
would be to draw a mistaken conclusion.
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-Irving Copi and Carl Cohen
Introduction to Logic, Tenth Edition,
1998
Chapter 6 : Fallacies, 6.2, "Fallacies of Relevance", R1, "The Argument
from Ignorance: Argument Ad Ignorantiam"
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. . . this we do affirm-that if truth is
sought in every division of Philosophy, we must, before all else, possess
trustworthy principles and methods for the discernment of truth. Now the
Logical branch is that which includes the theory of criteria and of proofs;
so it is with this that we ought to make our beginnings.
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-Sextus Empiricus
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It cannot be demanded that we should prove
everything, because that is impossible; but we can require that all
propositions used without proof be expressly declared to be so. . . .
Furthermore I demand-and in this I go beyond Euclid-that all of the methods
of inference used must be specified in advance.
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-Gottlob Frege
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*Perhaps it has no
philosophical verity, but the things men live by are rarely subject to
logical proof.
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-Lorenzo Smythe, the hero in Robert Heinlein's
Double Star, 1956
Chapter 2
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In a republican nation, whose citizens are
to be led by reason and persuasion and not by force, the art of reasoning
becomes of the first importance.
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-Thomas Jefferson
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~It is a melancholy
reflection that arguments, like men, are apt to be deceivers. . . .
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-Benjamin Jowett
Introduction to his 1871 translation of Plato's
Phaedo
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If you don't think that logic is a good
method for determining what to believe, make an attempt to convince me of
that without using logic. No one has even bothered to try yet.
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-Brett Lemoine
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Civilized life depends upon the success of
reason in social intercourse, the prevelance of logic over violence in
interpersonal conflict.
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-Juliana Geran Pilon
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Because language is misleading, as well as
because it is diffuse and inexact when applied to logic (for which it was
never intended), logical symbolism is absolutely necessary to any exact or
thorough treatment of our subject.
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-Bertrand Russell
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*I am like a machine set
at excessive speed: the bearings are overheated; another minute, and molten
metal will begin to drip, and everything will turn to naught. Quick---cold
water, logic. I pour it by the pailful, but logic hisses on the red-hot
bearings and dissipates into the air in whiffs of white, elusive steam.
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- D-503, the hero in Yevgeny Zamyatin's
We, 1920-1921
Twenty-Fourth Entry
Mirra Ginsburg, trans., 1972
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