Article
Keywords:
system LPC+Ch; consistency
Summary:
In his paper [Kybernetika 31, No. 1, 99–106 (1995; Zbl 0857.03042)], E. Turunen says in the corollary on p. 106:
“Notice that the third last line on page 195 in [J. K. Mattila, “Modifier logic”, in: J. Kacprzyk (ed.) et al., Fuzzy logic for the management of uncertainty. New York: Wiley. 191–209 (1992)] stating that LPC+Ch calculus is consistent is not correct.”
The system LPC+Ch is consistent, which can be seen quite trivially.
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References:
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An Introduction to Modal Logic. Methuen, London 1968 (reprinted New York 1985)
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[2] Mattila J. K.: Modifier logic. In: Fuzzy Logic for the Management of Uncertainty (J. Kacprzyk and L. A. Zadeh, eds.). J. Wiley, New York 1992, pp. 191–209
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Modified modus ponens and modal logic. Kybernetika (Supplement) 28 (1992), 28–32
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[4] Turunen E.:
Algebraic analysis of LPC+Ch calculus. Kybernetika 31 (1995), 1, 99–106
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