If you're specializing in something else but have knowledge of some other, unrelated thing, the latter is often at least accidentally concealed because it rarel

If you're specializing in something else but have knowledge of some other, unrelated thing, the latter is often at least accidentally concealed because it rarely comes up. Further, one might deliberately conceal it, to avoid having work assigned that distracts from the thing one is trying to focus on (for career development, personal preference, whatever reason). I've been known to pretend not to know a damn thing about WordPress, for instance. Even though I do.