There are always several surrealist answers to any question, whether major or minor. Werner Heisenberg, one of the founders of quantum mechanics, said, that: Òwhile the contrary of an exact statement is a wrong statement, the contrary of a true statement will often be another true statement.Ó A single thought is really nothing else than the refusal of thinking. We know where that leads. In passing I note that HeisenbergÕs view is close to the principle of ÒlՎcart absolu,Ó the essential concept of Fourier.