Is it even possible to have a dumb person who enjoys truly intellectual pursuits? I'm not outright stating its impossible, but I'd like to see a plausible scenario.
You'll have to define 'dumb' and 'truly intellectual' first. One might define a 'dumb' person as one who is incapable of enjoying 'truly intellectual pursuits' (whatever that means). In this case, no it's not possible but it's also pretty meaningless.