Assessing An Expert's Credentials Before Trusting A Claim
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A credential is only genuinely relevant when it closely matches the specific claim being made by the person holding it. A genuine expert in one particular field speaking confidently outside that field carries no more real authority on the topic than anyone else would, even though the credential itself remains entirely real and legitimate.
Checking an expert's actual area of specialisation carefully, not just their general title or job description, clarifies whether their credentials genuinely support the specific claim in question or whether the credential is simply being borrowed to lend weight it does not actually carry in this particular context.
It is also well worth checking whether a claim reflects a settled consensus within the relevant field or merely one individual's outlying view held apart from most peers. A single credentialed voice does not represent an entire field's considered position on any given question, however confidently it is delivered.