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Modes of persuasion

The modes of persuasion, modes of appeal or rhetorical appeals (Greek: pisteis) are strategies of rhetoric that classify a speaker's or writer's appeal to their audience. These include ethos, pathos, and logos, all three of which appear in Aristotle's Rhetoric.[1]

Being a notable figure in the field in question, such as a college professor or an executive of a company whose business is related to the presenter's topic

Demonstrating mastery of the terminology of the field ()

jargon

Being introduced by or producing from other established authorities

bona fides

Ethos [2](plural: ethea) is an appeal to the authority or credibility of the presenter.[3]: 41  It is how well the presenter convinces the audience that the presenter is qualified to speak on the subject. This can be done by:

entry by Christof Rapp in the Stanford Encyclopedia of Philosophy

"Aristotle's Rhetoric"