This article treats true knowledge  not as the exclusive problem of those who tries to know, but as a problem of subjects of our investigation. The most important here is next: does an  object of our  knowledge change after connection with our minds or not? Only if not we can speak about true knowledge, so we may delimit borders of science. Inside our limit will be only regular objects, all singular  objects or events will be located outside the limits of truth.

At the same time objects of art cannot be regular, only  singular ones, that is the condition of their including to the art.