The Supreme Sage: Philosophy's Rule of the World

The protagonist travels to a fantasy world (philosophical fantasy world) where "philosophical speculation" and "logical argumentation" are the source of supreme power. The strong men here can make laws with just one word, and break mountains and rivers with their refutations. The protagonist has the vast treasure trove of philosophical thoughts on the earth as a backing, and can instantly transform them into the power of this world. Using "sophistry" as the blade, he opens an invincible road to crush all sentient beings with his thoughts.