Strangely enough, one of the things I notice about online discussions is the poorness of clarity, the shoddy argumentation, and the amount of constant digressions. All this only seeks to confuse or confound a proper criticism of any given theory or proposition.
My expertise is in literary theory, rhetoric, and criticism (I also have a history degree but many of the same critical thinking skills apply). So here I am going to offer a few suggestions on how to critique someone else's comment(s), essays, and writing.
Before we begin, however, I have to explain what a critique is. In literary theory and criticism, a critique is an analytical criticism which gives a detailed analysis and assessment of something, especially a literary, philosophical, or political theory. We can extend criticisms to ideas, concepts, and beliefs as well. So without further delay, let us begin our investigation of how to write a better critique.