Philosophy&Thoughts: 現代論理学における矛盾について



3. Contradictions (A and not-A)









But in our case, the top line of the truth table doesn’t apply, since our two claims are contraries — they can’t both be true at the same time. So this case never applies. A conjunction is true only when both conjuncts are true. For all other truth values it’s false.





「P and -P」と「Q and R」は非常に違っています。

「P and -P」はPの内容を知らなくてもFだとわかります。つまり、Pの意味にも経験に依存しません。

これに対して「Q and R」がFであるのは、QとRの意味と同一物が別の場所に同時に存在することはできないという物理法則を前提しています。



About shibatau

I was born and grown up in Kyoto. I studied western philosophy at the University and specialized in analytic philosophy, especially Ludwig Wittgenstein at the postgraduate school. I'm interested in new technology, especially machine learning and have been learning R language for two years and began to learn Python last summer. Listening toParamore, Sia, Amazarashi and MIyuki Nakajima. Favorite movies I've recently seen: "FREEHELD". Favorite actors and actresses: Anthony Hopkins, Denzel Washington, Ellen Page, Meryl Streep, Mia Wasikowska and Robert DeNiro. Favorite books: Fyodor Mikhailovich Dostoyevsky, "The Karamazov Brothers", Shinran, "Lamentations of Divergences". Favorite phrase: Salvation by Faith. Twitter: @shibatau

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.