FYI Some words of wisdom from the master problem solver.  (Known for his famous book, How to Solve It.)

Bobbi Eisenberg

Pedantry and mastery are opposite attitudes toward rules. To apply a rule to the letter, rigidly, unquestioningly, in cases where it fits and in cases where it does not fit, is pedantry ... .  To apply a rule with natural ease, with judgment, noticing the cases where it fits, and without ever letting the words of the rule obscure the purpose of the action or the opportunities of the situation, is mastery. -George Polya, professor of mathematics (1887-1985)