# 邏輯效度

## 概論

${\displaystyle {\text{P}}}$ 唔係真確。

## 攷

1. Validity and Soundness 互聯網檔案館歸檔，歸檔日期2018年5月27號，.. Internet Encyclopedia of Philosophy.
2. L. T. F. Gamut, Logic, Language, and Meaning: Introduction to Logic, University of Chicago Press, 1991, p. 115.
3. Moldovan, A. (2009). Pragmatic considerations in the interpretation of denying the antecedent. Informal Logic, 29(3), 309-326.
4. Burke, M. B. (1994). Denying the Antecedent: A Common Fallacy?. Informal Logic, 16(1).
5. Kunen, Kenneth (1980), Set Theory: An Introduction to Independence Proofs, North-Holland.
6. Potter, Michael (2004), Set Theory and Its Philosophy: A Critical Introduction, Oxford University Press.