At present in logic people have different opinions on the question whether reduction to absurdity is direct refutation or indirect one.
The "irrefutable" commentary is the application in news commentary of "reduction to absurdity" in comedy and the caricature in arts.
reduction to absurdity
This paper tries to prove equivalence of Kelvin Statement and Clausius Statement of the second law of thermodynamics under negative absolute temperature by reduction to absurdity.
With the help of the technique for unlimitedly generating the corresponding pairs of vertices, this condition is proved with the method of reduction to absurdity.
But the method of infinite approach is used more widely, it is a uninfinite procedure, and it only can achieve the desired results with reduction to absurdity.
