What is rhetoric?
Rhetoric is the art of effective communication, especially persuasion. Over 2,300 years ago, the Greek philosopher Aristotle identified three key “modes of persuasion” that remain essential today: ethos, pathos and logos.
Whenever you read an advertisement, listen to a speech, watch a campaign video or scroll through social media, you are encountering rhetoric. Understanding it helps you persuade others effectively and resist manipulation.
The rhetorical triangle
Aristotle’s appeals correspond to the three points of the rhetorical triangle:
- Speaker / writer → Ethos (credibility)
- Audience → Pathos (emotion)
- Message → Logos (logic)
Effective communication balances all three.
Ethos: appealing to credibility
Ethos persuades by establishing the speaker’s trustworthiness, expertise or good character. Audiences are more likely to accept arguments from someone they respect.
How speakers build ethos
- Expertise: As a nurse with 15 years in emergency care…
- Experience: I grew up in this neighbourhood…
- Shared values: Like you, I want what’s best for our children.
- Fairness: acknowledging other views respectfully.
- Citing credible sources.
- Professional language and tone.
Ethos can be damaged by
- errors, insults or exaggerations,
- obvious bias or conflicts of interest,
- lack of relevant knowledge.
Pathos: appealing to emotion
Pathos persuades by stirring the audience’s emotions: fear, hope, anger, pride, compassion, guilt.
Techniques
- Anecdotes and stories about real people.
- Vivid imagery and descriptive language.
- Emotionally loaded words (innocent, devastating, heroic).
- Appeals to values (freedom, family, fairness).
- Images, music and video in multimedia.
Example
Charity ads often show a single child rather than statistics. Research and experience suggest people respond more strongly to one person’s story than to large numbers.
Caution
Pathos is legitimate when it highlights real stakes. It becomes manipulative when it replaces evidence or exploits fear.
Logos: appealing to logic
Logos persuades through reason: facts, statistics, evidence and logical structure.
Techniques
- Statistics and data.
- Research findings and expert testimony.
- Logical reasoning: cause and effect, comparison, deduction.
- Clear organization.
- Addressing counterarguments.
Example
Canada’s population is aging: by 2030, nearly one in four Canadians will be over 65. Without more trained caregivers, wait times for home care will grow. Therefore, governments must invest in health care training now.
The rhetorical situation
To analyze rhetoric, consider the full rhetorical situation:
- Speaker: Who is communicating? What is their background and position?
- Audience: Who is being addressed? What do they value or believe?
- Purpose: What does the speaker want the audience to think, feel or do?
- Message: What is the main claim?
- Context / occasion: When, where and why is this happening?
Kairos
The Greeks also valued kairos, the right timing. A speech about safety on the day after a disaster has powerful kairos. Recognizing why a message is delivered at a particular moment deepens analysis.
Analyzing rhetoric: a process
- Determine the rhetorical situation (SOAPS: Speaker, Occasion, Audience, Purpose, Subject).
- Identify the main claim.
- Find examples of ethos, pathos and logos.
- Analyze the effect: why is each appeal effective for this audience and purpose?
- Evaluate: Is the balance appropriate? Are any appeals manipulative or weak?
Worked example
Excerpt (from a student council speech): “I’ve served on student council for three years, and I’ve listened to hundreds of you. Last winter, I watched a Grade 9 student wait 40 minutes outside in the cold because our school has no covered bus shelter. Fifty-two percent of our students ride the bus. A shelter would cost less than our annual dance budget. Let’s make sure no one has to freeze while waiting to get home.”
- Ethos: three years of service; listening to students.
- Pathos: the image of a student freezing in the cold.
- Logos: 52 percent ride the bus; the cost comparison.
- Effect: the speaker combines credibility, a sympathetic story and practical data, making the proposal seem reasonable, urgent and affordable.
Rhetorical devices that support appeals
- Repetition / anaphora: We shall fight on the beaches, we shall fight on the landing grounds…
- Rhetorical questions: How much longer must we wait?
- Parallelism: balanced structures for memorable rhythm.
- Antithesis: contrasting ideas (Ask not what your country can do for you; ask what you can do for your country).
- Allusion: reference to well-known history, literature or culture.
Common mistakes
- Identifying appeals without analyzing their effect.
- Treating pathos as automatically negative.
- Ignoring the audience and context.
- Labelling every fact as logos without examining the reasoning.
Try it yourself
Identify the main appeal:
- “As a climate scientist who has studied Arctic ice for 20 years…”
- “Imagine your grandchildren never seeing a living coral reef.”
- “Electric vehicles produce up to 70 percent fewer lifetime emissions than gasoline cars.”
- Why might a speaker combine all three appeals?
Answers: 1. Ethos. 2. Pathos. 3. Logos. 4. Different audience members respond to different appeals; combining them builds trust, emotional engagement and logical support for a more convincing argument.
Study tip
Analyze one advertisement per week. Label its ethos, pathos and logos, and identify the target audience. You will soon see rhetoric everywhere and become a more critical consumer of media.
Quick recap
- Rhetoric is the art of persuasion.
- Ethos builds credibility; pathos stirs emotion; logos uses logic and evidence.
- Analyze the rhetorical situation: speaker, audience, purpose, message, context.
- Kairos is about timing.
- Strong analysis explains how and why appeals work for a specific audience.