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scheme_expert_opinion
The argument from expert opinion appeals to the testimony or judgment of a recognized authority in a relevant field to support a claim. This is one of the most common and often legitimate argumentation schemes, but it becomes fallacious when the expert speaks outside their domain, has conflicts of interest, or when expert consensus is misrepresented. The strength of the argument depends on the expert's actual qualifications, the relevance of their expertise, and whether other experts agree.
A climate scientist with 200 peer-reviewed publications states that current warming trends are primarily caused by human activity. This carries significant weight because the expert has domain-specific credentials, their claim aligns with the scientific consensus, and the field has established methods for evaluating such claims.
A structural engineer with 30 years of experience and authorship of the national building code testifies that a specific bridge design is unsafe under projected load conditions. Her opinion carries strong evidential weight because it falls squarely within her domain of expertise and is grounded in technical analysis.
A cardiologist who has conducted clinical trials on dietary fat and heart disease recommends that patients reduce saturated fat intake based on the current body of evidence. Patients and physicians give this recommendation serious weight because it comes from a domain expert whose work directly informs the claim.
Binary (yes/no) questions an LLM must answer to identify this aspect:
Is a source cited as an expert to support a claim?
Type: binaryIs the source actually an expert in the relevant domain?
Type: binaryIs the claim consistent with the consensus among experts in the field?
Type: binaryIs the expert's assertion based on evidence, not just opinion?
Type: binaryThe argument from expert opinion appeals to the testimony or judgment of a recognized authority in a relevant field to support a claim. This is one of the most common and often legitimate argumentation schemes, but it becomes fallacious when the expert speaks outside their domain, has conflicts of interest, or when expert consensus is misrepresented. The strength of the argument depends on the expert's actual qualifications, the relevance of their expertise, and whether other experts agree.
People cannot independently evaluate every claim, so relying on expert judgment is a rational cognitive shortcut. Expertise signals years of training and peer accountability, making expert claims more likely to be accurate than non-expert claims.
Verify that the expert is speaking within their area of expertise, check for conflicts of interest, and examine whether the expert's view represents consensus or a fringe position. Ask what the critical questions for this scheme are: Is the expert credible? Is the field relevant? Do other experts agree?
Expert opinion arguments dominate medical consultations, legal proceedings (expert witnesses), policy debates, and media commentary. Their misuse includes celebrity endorsements of products outside their competence.
Giving excessive weight to authority figures, even outside their competence.
Attacking the arguer's character, motives, or attributes instead of the argument.
Giving excessive weight to authority figures, even outside their competence.
Use these tools to detect, analyze, or train this aspect.