Abstract
Three aspects of the modern logical investigations are considered. First of all we discuss aims and the subject of logic as it appears today. Secondly, we pay a certain attention to ontological conditions which make logical activity possible. And in a third place, we discuss the idea of the logical topology, which is defined by an appropriate (non)contradiction operator. The specifics of this operator are provided by the formal notion of the contradiction, defined directly without appealing to the concept of the truth.