Page:Landmarks of Scientific Socialism-Anti-Duehring-Engels-Lewis-1907.djvu/152



(Here Herr Duehring contends "The first and most important statement with respect to the foundation logical properties of existence points to the exclusion of contradiction. Contradiction is a category which can belong to thought alone but which can pertain to nothing real. There are no contradictions in things; in other words the law of contradiction is itself the crowning point of absurdity." To which Engels replies as follows):

The thought content of the foregoing passages is contained in the statement that contradiction is an absurdity and cannot occur in the actual world. This statement will have for people of average common sense the same self-evident truth as to say that straight cannot be crooked nor crooked straight. But the differential calculus shows in spite of all the protests of common sense that under certain conditions straight and crooked are identical, and reaches thereby a conclusion which is not in harmony with the common sense view of the absurdity of there being any identity between straight and crooked. Considering moreover the significant role which the so called Dialectic of the Contradiction played in the ancient Greek philosophy, a stronger opponent than Herr Duehring would be obliged to meet it with better arguments than a mere affirmation and a number of epithets.

As long as we regard things as static and without life,