Dialectic and rhetoric have acquired negative connotations in the last several decades. This presentation suggests that a return to the Aristotelian notions of dialectic and rhetoric can recover the valid senses of those terms, and provide a standpoint from which contemporary contributions to rhetoric and argumentation theory (e.g., Perelman, Grootendorst/van Eemeren) can be viewed in a positive way. An overview of fallacies rounds out how logic, argumentation theory and rhetoric intersect to comprise the subject matter of modern critical thinking as a locus of interdisciplinary study.

Here is the link to the SlideShare:
Aristotelian Foundations of Critical Thinking from William Minto.