First Principles Thinking

Core principle: Strip away assumptions, conventions, and analogies. Reduce everything to the fundamental truths you know to be true, then rebuild from there. Most thinking is by analogy — "we do it this way because that's how it's done." First principles asks: why is it done that way at all?

The Core Process

Step 1: Identify the Current Belief or Solution

State clearly what is currently assumed, accepted, or proposed:

• What is the existing approach?
• What problem is it trying to solve?
• What does everyone in this space assume to be true?

Step 2: Challenge Every Assumption

For each element of the current approach, ask:

• "Is this actually true, or do we believe it because we've always believed it?"
• "Is this a constraint of reality, or a constraint of convention?"
• "What would have to be true for this assumption to be wrong?"

Distinguish between:

• Physical constraints: Laws of nature, math, physics — these are real
• Resource constraints: Time, money, people — real but changeable
• Conventional constraints: "You can't do X" meaning "nobody has done X yet"
• Inherited assumptions: Decisions made for past conditions that no longer apply

Step 3: Identify the Fundamental Truths

What do you actually know, stripped of convention?

• What is the core need being served?
• What are the irreducible requirements?
• What would this look like if you designed it from zero, knowing only what's physically true?

Step 4: Rebuild From the Ground Up

Starting only from fundamental truths, reconstruct the solution:

• What's the simplest approach that satisfies the real requirements?
• What would this look like if invented today, with today's capabilities?
• What existing constraints can be eliminated now that you're not inheriting them?

Output Format

🏛️ Current Belief / Approach

State what's being questioned:

• The existing design, strategy, or assumption
• Why it exists (historical or conventional reason)
• What problem it was meant to solve

🔬 Assumption Deconstruction

For each major assumption:

🧱 Fundamental Truths Identified

What do we actually know, independent of convention?

• Core need: [The real underlying need being served]
• Hard constraints: [What is genuinely immovable]
• Validated facts: [What has been empirically confirmed]

🔨 Rebuilt Solution

Starting from fundamentals:

• What does the solution look like without inherited assumptions?
• What changes dramatically?
• What stays the same (and why — what fundamental truth supports it)?
• What's now possible that wasn't in the old frame?

⚠️ Assumption Risks

Which surviving assumptions are highest-risk?

• If any single assumption proves wrong, what breaks?
• Which assumptions should be validated before committing?

Thinking Triggers

• "What is this actually trying to accomplish at the most basic level?"
• "If we were building this today with no legacy, what would we do?"
• "Is this a law of nature or a law of habit?"
• "Who decided this was the right way, and what were their constraints?"
• "What would a brilliant outsider — who doesn't know our conventions — suggest?"
• "Are we solving the problem, or are we solving our version of the problem?"

Analogy vs. First Principles

Most thinking operates by analogy:

"We do it like company X does it" / "The industry standard is Y" / "That's how it's always been done"

Analogy-based thinking is fast and usually adequate. But it inherits the constraints and mistakes of the original. When something is fundamentally broken or when you need a step-change improvement — not an incremental one — analogy thinking will never get you there.

First principles is slower but the only path to genuinely novel solutions.

Example Applications

• "Should our agent pipeline be sequential?" → Why sequential? What's the fundamental constraint? Is it ordering of dependencies, or just convention borrowed from waterfall?
• "We need a dedicated QA team" → Is QA a separate function by necessity, or because testing was historically slow and manual?
• "Our API needs versioning" → What's the actual need — backward compatibility. What's the minimum mechanism that provides that, built from scratch?
• "We need standups every day" → What's the fundamental need? Coordination. What are all the ways to achieve that, unconstrained by "meeting" as a format?