Mental Models

First Principles Thinking

Reduce a problem to its core constraints and truths, then build upward from there.

First principles thinking breaks assumptions into basic truths so you can reassemble better solutions.

Core question

What must be true here, independent of convention or precedent?

Example

Instead of asking how competitors price a tool, break pricing into value delivered, user alternatives, and switching cost, then design from fundamentals.

How to apply

1.Write down the current assumptions in the domain.
2.Challenge each assumption with evidence.
3.Extract constraints that are physically, mathematically, or behaviorally true.
4.Rebuild options from those constraints.

Pitfalls

·Discarding useful conventions that encode hard-won lessons.
·Underestimating implementation complexity.
·Using first principles language without doing real decomposition.

Questions

How is first principles thinking different from analogy?

Analogy borrows existing solutions; first principles rebuilds from fundamentals. The best operators usually combine both.

When is first principles thinking most useful?

When existing solutions are expensive, slow, or constrained by inherited assumptions.

Occam's Razor
Favor the simplest explanation that fits the facts.
Map Is Not Territory
Models are abstractions, not reality itself.
OODA Loop
Observe, orient, decide, act, then repeat faster with better learning.