συλλογισμός

A deductive argument.

And, what is worse, the reader often shares the writer's prejudices, and is far too well pleased with his conclusions to examine either his premises or his reasoning. Stand on a barrel in the streets of Bagdad, and say in a loud voice, "Twice two is four, and ginger is hot in the mouth, therefore Mohammed is the prophet of God," and your logic will probably escape criticism; or, if anyone by chance should criticise it, you could easily silence him by calling him a Christian dog.

Again, from A.E. Housman's The Application of Thought to Literary Criticism.