Logic

The logical structure of human thought is immutable throughout the whole course of time and is the same for all races, nations, and classes.

Epistemological Problems of Economics, p. 204

We can speak to each other only because we can appeal to something common to all of us, namely, the logical structure of reason.

Omnipotent Government, p. 143

Polylogism denies the uniformity of the logical structure of the human mind. Every social class, every nation, race, or period of history is equipped with a logic that differs from the logic of other classes, nations, races, or ages. Hence bourgeois economics differs from proletarian economics, German physics from the physics of other nations, Aryan mathematics from Semitic mathematics.

Theory and History, pp. 31–32

Polylogism is not a philosophy or an epistemological theory. It is an attitude of narrow-minded fanatics, who cannot imagine that anybody could be more reasonable or more clever than they themselves. Nor is polylogism scientific. It is rather the replacement of reasoning and science by superstitions. It is the characteristic mentality of an age of chaos.

Omnipotent Government, p. 147