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Kunstgriff 33

»Das mag in der Theorie richtig sein; in der Praxis ist es falsch.« – Durch dieses Sophisma gibt man die Gründe zu und leugnet doch die Folgen; im Widerspruch mit der Regel a ratione ad rationatum valet consequentia. – Jene Behauptung setzt eine Unmöglichkeit: was in der Theorie richtig ist, muß auch in der Praxis zutreffen; trifft es nicht zu, so liegt ein Fehler in der Theorie, irgend etwas ist übersehn und nicht in Anschlag gebracht worden, folglich ist's auch in der Theorie falsch.

 

Stratagem XXXIII

"That's all very well in theory, but it won't do in practice." In this sophism you admit the premisses but deny the conclusion, in contradiction with a well-known rule of logic. The assertion is based upon an impossibility: what is right in theory must work in practice; and if it does not, there is a mistake in the theory; something has been overlooked and not allowed for; and, consequently, what is wrong in practice is wrong in theory too.


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