🧠 First Principles Thinking

From Opinions to First Principles

First principles thinking means starting from undeniable facts, not habits, analogies, or authority.

• Ask: What must be true, no matter what?
• Strip away jargon, tradition, and prestige
• Rebuild your view from these basic truths

> Think like a scientist: begin with evidence, not folklore.

This method is powerful in science, engineering, strategy, and daily decisions.

First Principles vs. Analogy

Most people think by analogy:

• "This new problem is like that old one."
• Then they copy old solutions.

First principles thinking:

1. Break the problem into pieces

2. Identify basic truths about each piece

3. Reassemble in a new way

Analogy is fast but conservative. First principles is slower but more original.

Three Core Questions 🧩

When using first principles, keep asking:

1. What do I know for sure? (evidence, definitions, constraints)

2. How do I know it? (source, method, bias)

3. What follows logically? (implications)

If you cannot justify a belief, treat it as a hypothesis, not a principle.

Historical Roots

First principles thinking appears in:

• Aristotle: search for basic causes
• Descartes: doubt everything, keep only the indubitable
• Physics: derive laws from fundamental quantities

Modern innovators use the same pattern: reduce problems to essentials, then recombine.

You are learning an ancient method with very modern power.