In this article I want to show the ambiguity of the popular division of economics: 'positive economics' and 'normative economics'. In my opinion economists interpret the meaning of these terms in different ways. At the beginning I present the criteria of distinguishing 'positive economics' from 'normative economics', which are often used by different groups of contemporary economists. Then I create a typology of different meanings of these terms used by the economists. Finally, I quote different economists who use these terms in different meanings. This way I present the ambiguities in economists' language. I conclude by indicating the damage caused by the ambiguity of the discussed classification. It can be the cause of unsolved arguments that unnecessarily involve participants' time and effort.