Smart

What is smart? Bill Clinton combines a prodigious memory with excellent communications skills and is credited with being a political genius. Dr. Dre obviously has mixed excellent rap-rhyming skills with good business acumen into a successful career. Taxi actress Marilu Henner is one of the very few people who has perfect recall (eidetic memory). This together with her good looks  and acting skills has helped make for her a good life. And it seems all good actors and actresses usually merge good memories for lines with good muscle memories (for facial expressions). Albert Einstein clearly had formidable abstract reasoning abilities combined with the ability to communicate these insights to the rest of the world. And there is obviously one other beneficial ingredient ... hard work. As Thomas Edison is credited with saying, "genius is one percent inspiration and ninety-nine percent perspiration."

Thus comes my premise ... very "smart" people or geniuses most often include two or more three-sigma qualities into one package ... which usually involve good communication skills and hard work. Perspicacity is not always a necessary requirement ... as our current president so aptly exhibits.