Logos - appeal to logic

- Theoretical, abstract  language
- Denotative meanings/reasons
- Literal and historical analogies
- Definitions
- Factual data and statistics
- Quotations
- Citations from experts and authorities
- Informed opinions

EFFECT = Evokes a cognitive, rationale response


The Greek word logos is the basis for the English word logic.  Logos is a broader idea than formal logic--the highly sybolic and mathematical logic that you might study in a philosophy course.  Logos refers to any attempt to appeal to the intellect, the general meaning of "logical argument."  Everyday arguments rely heavily on ethos and pathos, but academic arguments rely more on logos.  Yes, these arguments will call upon the writers' credibility and try to touch the audience's emotions, but there will more often than not be logical chains of reasoning supporting all claims.