Excellent, excellent question. The answer, as with all nuanced topics, is it depends. Logos, as you may know, is a Greek term, which, in English, simply means word. So in the broadest etymological sense, the two concepts are non-equivalent. read more
As nouns the difference between logos and logic is that logos is (rhetoric) a form of rhetoric in which the writer or speaker uses logic as the main argument or logos can be while logic is (uncountable) a method of human thought that involves thinking in a linear, step-by-step manner about how a problem can be solved logic is the basis of many principles including the scientific method. read more
Logos focuses on the logical and rational presentation of facts; pathos focuses on emotional ideas and images that persuade. Logos focuses on emotional ideas and images that persuade; pathos focuses on the logical and rational presentation of facts. read more