How to identify the Appeal to Authority fallacy?

Why do not all experts strengthen an argument?

The appeal to authority fallacy assumes a claim is true simply because an authority figure said it, even if that person is not qualified in the relevant area. Media environments frequently feature celebrities, influencers, and public figures who offer opinions outside their expertise.

For example, a celebrity endorsing medical advice does not make the advice scientifically valid. Similarly, citing an expert in one field as proof in an unrelated field is misleading.

To avoid this fallacy, consider whether the authority has expertise directly related to the claim. Evidence should support the argument, not the person’s status.