Joel Spolsky, the founder of Trello and Stack Overflow said in one of his blog posts on Joel on Software (back when it was popular):
How do you know whether to hire someone? In principle, it’s simple. You’re looking for people who are 1. Smart, and 2. Get things done. That’s it.
It’s easy to get inclined on hiring someone with either of these traits. That’s not enough. You can come across a “smart” person who isn’t practical and cannot get things done.
I don’t like to kill the importance of those HR handbooks on recruitment but trust me - this is the gist of it.