Full Idea
I hold that my Basic Law V is a law of pure logic.
Gist of Idea
My Basic Law V is a law of pure logic
Source
Gottlob Frege (Grundgesetze der Arithmetik 1 (Basic Laws) [1893], p.4), quoted by Penelope Maddy - Naturalism in Mathematics I.1
Book Reference
Maddy,Penelope: 'Naturalism in Mathematics' [OUP 2000], p.6
A Reaction
This is, of course, the notorious law which fell foul of Russell's Paradox. It is said to be pure logic, even though it refers to things that are F and things that are G.