Authors:

Most "original" ideas aren't completely original, but instead are the result of two basic methods for generating ideas: problems in search of solutions and solutions in search of problems.

Barry Nalebuff, Ian Ayres (2006). “Why Not?: How to Use Everyday Ingenuity to Solve Problems Big and Small”, p.14, Harvard Business Press
Most original ideas aren't completely original, but instead are the result of two basic methods for generating ideas: problems in search of solutions and solutions in search of problems.