Notes on Analyzing Arguments: Presenting Evidence

Relevant evidence applies directly to the argument; irrelevant details weaken persuasiveness (e.g., car maintenance records are relevant to dependability, while hand-tooled leather seats are not).
Accurate evidence requires correct quotation, faithful representation of sources, and context retention; assess bias and source credibility.
Sufficient evidence means providing enough support for the thesis; avoid relying on a single anecdote or source (e.g., one mechanic’s view may be overly negative).
Aim to present clearly how each piece of evidence supports the claim; don’t assume readers infer the relationship.

First-hand evidence: knowledge from personal experience, anecdotes, observations, or general experience.
Personal experience (pathos): adds human element and can introduce the issue in an engaging way; best when the writer speaks as an insider.
Limitations: not universal proof; needs support from additional evidence to be persuasive.
Example idea: using personal involvement in an issue (e.g., single-sex classrooms) to frame the argument; supplement with broader data.

Uses personal experience in a Kentucky nature preserve to illustrate lack of minority presence in environmental spaces.
Combines insider perspective with some statistics to argue for greater minority involvement in environmentalism.
Demonstrates how personal narrative can establish ethos and appeal to readers, while needing broader data to bolster the case.
Emphasizes that environmentalism should not appear as a ‘white’ movement to maintain momentum.

Anecdotes are first-hand accounts about others (second-hand first-hand evidence).
Useful for pathos and giving a human face to issues (e.g., Wendy Ruiz’s tuition story).
Must be used carefully; a single anecdote is not representative evidence for broad claims.

Definition: drawing a broad conclusion from insufficient or non-universal evidence.
Risk: personal experiences or isolated cases do not constitute universal proof.
Example: a single negative experience with wisdom teeth does not prove that removal is always necessary.

Current events are first-hand observations of ongoing events; provide timely context.
Can be interpreted in various ways; consult multiple perspectives to avoid bias.
Example approach: discuss recent educational debates using contemporary events and position them within a broader trend (Steve Jobs, Education, and public schooling).

Definition: evidence derived from research, reading, or investigation; anchors argument in established knowledge; primarily appeals to logos.

Verifiable facts from research that provide background or context; helps establish credibility through diligence.
Pitfall: history is complex; keep descriptions concise and avoid misrepresentation.
Example pattern: use a brief, detailed historical snapshot to compare with a current issue (e.g., 1920s bigotry markers).

Latin for “after which, therefore because of which”—correlation does not imply causation.
Caution: be wary of assigning causality based on sequence; complex causality often requires careful evidence.
When using historical evidence, assess potential multiple causes and avoid simplistic links.

An expert: someone with published research or specialized knowledge; credibility of the source matters to audience.
Local experts (teachers, administrators) can be credible depending on context.
Example: citing a historian or scholar to discuss cultural phenomena; credential transparency strengthens the argument.
Fallacy to avoid: false authority—don’t cite someone as expert if they lack relevant credentials.

Defined: evidence expressed in numbers (statistics, surveys, polls, census data); strong logos appeal.
Useful to illustrate scale and trends (e.g., fast-food sales, time spent in school, teacher qualification).
Example points: compare international education metrics (Korea vs USA) and teacher qualifications to argue about outcomes.
Note on presentation: numbers can be summarized qualitatively (e.g., higher averages, longer school days) without listing all figures.

Appealing to an authority with no relevant expertise or questionable credentials.
Always verify background and qualifications before citing an expert.

Definition: arguing that an action is good because many people are doing it; seeks validation by popularity.
Warning: popularity does not guarantee correctness; evaluate evidence on its merits, not just its prevalence.