Irrelevant might be too strong of a word. Yes, it might not be as significant as your own problem solving skills but they are still important. You have to remember that tools chosen by you to solve problems.<p>You wouldn&#x27;t say what tools you use to build a house is irrelevant only carpenter&#x27;s skills.<p>Picking the right tool for the right problem is part of problem solving. Sometimes picking the right tool might boil down to what you are most comfortable with, or sometimes it might be learning a tool that you are not familiar with.<p>(Of course, you shouldn&#x27;t flock to a particular tool just because someone else said so.)<p>Anyways, picking the right tools are important part of your problem solving skills.<p>Graham and his buddy were good problem solvers who picked the right tool for the problem that they were solving.