Oh definitely - what a PhD can do is demonstrate that someone can understand a subject matter deeply and apply a high level of reasoning to it - which is a process towards becoming intelligent in a lot of matters, and something they've drilled for several years to achieve for a PhD. That being said, the intelligence they've got doesn't necessarily equal wisdom (= intelligence v experience), so they might have very little intelligence in other areas - but not to say they can't learn it though. Theres a lot to learn in this world and judging someone for not knowing something you do when they've not had the opportunity to learn something yet is like beating a toddler at your favourite video game and calling them shit... and this arrogant judgement works both ways (people who judge academics, and academics who judge people who haven't attended University).