Ethos, pathos, and logos
Aristotle described three main ways to persuade. Recognising them helps you analyse others' arguments and build your own.
The rhetorical triangle
The rhetorical triangle links the writer, the audience, and the message. Aristotle's three appeals map onto it: ethos (the writer's credibility), pathos (the audience's emotions and values), and logos (the logic and evidence of the message). Strong writing usually balances all three.
Ethos
Ethos is the credibility or character of the writer. It comes from expertise (a doctor writing about health), from fairness (acknowledging other views), from careful use of sources, and from correct, clear writing. A sloppy, insulting, or error-filled text damages ethos, however good its points.
Pathos
Pathos appeals to the audience's emotions, values, and imagination. A charity appeal that tells one child's story uses pathos. Emotion is a legitimate part of persuasion, because people care about what moves them, but pathos becomes manipulative when it replaces or distorts the facts.
Logos
Logos is the appeal to reason: clear claims, logical structure, and evidence such as statistics, examples, expert testimony, and reasoning. An argument for a policy that cites data on costs and outcomes and explains cause and effect relies on logos.
Combining appeals
A strong op-ed on air pollution might open with a story of a child with asthma (pathos), cite health research and pollution data (logos), and show the writer's background as a respiratory nurse while fairly addressing industry concerns (ethos). Relying on one appeal alone is usually weaker.
Analysing appeals
When you analyse a text, identify which appeals it uses, how, and how effectively for its audience. Do not just label: explain the effect. 'The author uses pathos' is weak; 'By describing the empty classroom chairs, the author makes readers feel the loss of closed rural schools' is strong.
Kairos and other appeals
Some teachers add kairos (timeliness) as a fourth consideration, since the same argument can succeed or fail depending on the moment. Others discuss telos (purpose) and audience values. These ideas all help explain why a particular text works on a particular audience.
Worked example
An advert for running shoes shows an Olympic champion (ethos), dramatic music as an ordinary runner crosses a finish line in tears (pathos), and a line claiming the shoes reduce impact by 20% in lab tests (logos). Analysing it, you might question whether the lab claim is independently verified and whether the emotion distracts from it.
Key takeaways
The rhetorical triangle connects writer, audience, and message. Ethos is credibility; pathos is emotional and value-based appeal; logos is logic and evidence. Effective persuasion usually combines them. Analysis should explain how and how well appeals work, not just name them. Kairos adds the importance of timing.
Flashcard
Writer, audience, message
Check your understanding
A writer mentions her 20 years as an emergency room doctor before arguing about hospital staffing. Which appeal is she mainly using?