At this moment, in this nation, we currently bear witness people without any brief or expertise in a given subject nonetheless speaking with grotesquely misplaced confidence in their own genius. There is a word for this: bloviating. There is also a term of art to describe it: epistemic trespassing.
In any case, now seems like just about the perfect moment to publish this context clues worksheet on the noun credential. Please do keep in mind that the Latin word root cred means believe. When someone possesses a credential from a reputable (credible, if you like) educational institution, that means they are someone we can believe, rather than a political hack with a big mouth and few brains. If you are interested in going a bit further with this with your students, here is a worksheet on the Latin word root cred itself.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.