A reasoning approach that breaks complex problems down to their most fundamental, independently verifiable truths, then rebuilds solutions from the ground up rather than reasoning by analogy or convention. Popularized in modern business by Elon Musk, first principles thinking originated with Aristotle and is foundational to the scientific method.
This framework is particularly valuable for decisions where conventional wisdom may be outdated or where existing solutions carry accumulated assumptions that no longer hold. It forces the question: "What do we actually know to be true?"