[Velvet]

"It's not that I'm so smart, it's just that I stay with problems longer."

I like to stay with something too, I think this attitude is a disposition.

If I may share this with you. I remember we had a calculus problem on a test which I could not solve no matter how I approached it. That particular question stayed with me over the years and every now and then I’d make another attempt, sort of like at a crossword puzzle. Then 3 years after I graduated, in the summer while at the cottage, in a dream, the solution came to me! I was elated. But I have never used the equation for anything. (Calculating the volume of an irregular mass.)