A laundry detergent brand is currently running an ad campaign with the tagline "Style is an option. Clean is not." Obviously, what they mean is that cleanliness is required while stylishness is not; but the way I interpret the tagline, what they're actually saying is that stylishness is available as a possible choice, but cleanliness is impossible — it's not on the menu.
Before I drive my family nuts by muttering "optional, optional, optional " every time the commercial comes on, can y'all confirm that my distinction between option and optional is grounded in reality?
option (n): an available item that can be chosen (or not).
optional (adj): not required; elective.
 Yeah, yeah, I know, too late... :p