Credentials and Qualifications
Credentials are symbols that it is presumed indicate the presence of qualifications.
Qualifications are the properties that render someone or something capable and competent of handling a specific task or problem.
In this world, there are countless people who possess credentials but not qualifications, and countless people who think the presence of credentials indicates the presence of qualifications — more disturbingly, they also usually believe that absence of credentials indicates the absence of qualifications.
One of the more common forms of the fallacy argumentum ad verecundiam involves demanding that the opposing side present credentials before their arguments will be evaluated.