Most teams solve by analogy: "Here's what worked for us before, so let's do it again." Or: "Here's what everyone in the industry does." First Principles reasoning asks a different question: What is physically and economically true about this situation? Not: what have we tried? But: what *must* be true?
When analogy and precedent have left you stuck. Old paradigm questions that won't budge. When teams feel like they're rearranging furniture on a sinking ship. When someone in the room says, "That's how we've always done it," and it's blocking forward motion.
We worked a 25-year-old homicide case beside Indianapolis police. The case had stalled because investigators were locked into one interpretive frame. When we applied first-principles thinking, stripping assumptions, asking what was physically true, new leads surfaced that had been invisible. The old frame had to come off. Something real appeared underneath.
We start by naming what everyone *assumes* is true. Then we test each assumption: Is this actually true, or is this what we've been told? What would change if we let this assumption go? We separate what must be true (physics, laws, hard facts) from what we merely think should be true (norms, precedent, how the industry works).
Once you've stripped the problem to its essentials, you rebuild. And what you build usually looks nothing like what was there before, because the old structure was built on assumptions that didn't hold water. Teams often discover they don't need half the complexity they thought was necessary. The real solution is usually simpler and stronger.
Work with this lens: First Principles Thinking Training. Or read the field note: First principles thinking, in depth.
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