Cognitively slow isn't a proper term. Overall term "slow" is offensive. Have you been diagnosed with cognitive impairment or were you diagnosed with slow processing speed? I do not know what you mean by slow. It typically isn't appropriate word in the context. So you observe how most people look at so called "slow" with contempt. Who are these people and how do they express their contempt? How do they express their disrespect? By doing what?