Full Idea
Thought is in essentials the same everywhere: it is not true that there are different kinds of laws of thought to suit the different kinds of objects thought about.
Gist of Idea
Thought is the same everywhere, and the laws of thought do not vary
Source
Gottlob Frege (Grundlagen der Arithmetik (Foundations) [1884], Intro)
Book Reference
Frege,Gottlob: 'The Foundations of Arithmetic (Austin)', ed/tr. Austin,J.L. [Blackwell 1980], p.-9
A Reaction
Different kinds of thinker might also be candidates for different laws of thought. I'm unsure of Frege's grounds for this claim; most continental philosophers would probably reject it.