Single Idea 19333

[catalogued under 3. Truth / A. Truth Problems / 1. Truth]

Full Idea

In every true affirmative proposition, necessary or contingent, universal or particular, the concept of the predicate is in a sense included in that of the subject; the predicate is present in the subject; or else I do not know what truth is.

Gist of Idea

A truth is just a proposition in which the predicate is contained within the subject

Source

Franklin Perkins (Leibniz: Guide for the Perplexed [2007], 1686.07.4/14)

Book Reference

Leibniz,Gottfried: 'The Leibniz-Arnauld Correspondence', ed/tr. Mason,HT/Parkinson,GHR [Manchester UP 1967], p.63


A Reaction

Why did he qualify this with "in a sense"? This is referred to as the 'concept containment theory of truth'. This is an odd view of the subject. If the truth is 'Peter fell down stairs', we don't usually think the concept of Peter contains such things.