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Single Idea 2111

[filed under theme 5. Theory of Logic / D. Assumptions for Logic / 3. Contradiction ]

Full Idea

We judge to be false that which involves a contradiction, and true that which is opposed or contradictory to the false.

Gist of Idea

Falsehood involves a contradiction, and truth is contradictory of falsehood

Source

Gottfried Leibniz (Monadology [1716], §31)

Book Ref

Leibniz,Gottfried: 'Philosophical Writings', ed/tr. Parkinson,G.H.R. [Dent 1973], p.184

The 5 ideas with the same theme [when two statements are in logical conflict]:

10121 Contradiction is not a sign of falsity, nor lack of contradiction a sign of truth [Pascal]
2111 Falsehood involves a contradiction, and truth is contradictory of falsehood [Leibniz]
18736 Contradiction is between two rules, not between rule and reality [Wittgenstein]
23496 Two colours in the same place is ruled out by the logical structure of colour [Wittgenstein]
12194 Contradictions include 'This is red and not coloured', as well as the formal 'B and not-B' [Rumfitt]