Their value is mainly as starting points: as questions for the people who had them to continue thinking about.
It means someone who takes their work a little too seriously; someone who does what they do so well that they pass right through professional and cross over into obsessive.
But the smarter they are, the less pressure they feel to act smart.
So as a rule you can recognize genuinely smart people by their ability to say things like "I don't know," "Maybe you're right," and "I don't understand x well enough."This technique doesn't always work, because people can be influenced by their environment.
The woman in charge of sales was so tenacious that I used to feel sorry for potential customers on the phone with her.
You could sense them squirming on the hook, but you knew there would be no rest for them till they'd signed up.