I came to realize that when faced with a problem, most people look for one right solution because that’s the way they were brought up. All through school they had to answer multiple-choice and true-or-false questions, questions that had only one right answer. And so they assume that all questions an problems are like that and when they can’t find a solution that looks perfect they give up.
From How to get Ideas
Ala' Yasin Abuhijleh 