Law Of The Instrument

The 'law of the instrument' refers to a cognitive bias in which people want to use the same "tool" for every purpose. Primarily aimed at education it essentially uses the maxim "If your only tool is a hammer then everything looks like a nail." This emphasizes that every problem is unique and requires a different "tool" (or method) to impart the lesson rather than always bludgeoning away with the "hammer" that may not necessarily work.