General intelligence and practical intelligence are "orthogonal"

From Malcolm Gladwell’s Outliers. Page 101.

The particular skill that allows you to talk your way out of a murder rap, or convince your professor to move you from the morning to the afternoon section, is what the psychologist Robert Sternberg calls "practical intelligence." To Sternberg, practical intelligence includes things like "knowing what to say to whom, knowing when to say it, and knowing how to say it for maximum effect." It is procedural: it is about knowing how to do something without necessarily knowing why you know it or being able to explain it. It's practical in nature: that is, it's not knowledge for its own sake. It's knowledge that helps you read situations correctly and get what you want. And, critically, it is a kind of intelligence separate from the sort of analytical ability measured by IQ. To use the technical term, general intelligence and practical intelligence are "orthogonal": the presence of one doesn't imply the presence of the other. You can have lots of analytical intelligence and very little practically intelligence, or lots of practical intelligence and not much analytical intelligence, or - as in the lucky case of someone like Robert Oppenheimer - you can have lots of both.