The One Thing You Need to Believe
Collapse every deal into a single core belief
- Difficulty
- Moderate
- Time to result
- ~ongoing to results
- Steps
- 3
- Confidence
- 90%
Gil does enormous diligence — multiple CFO meetings, walking the financial model, customer calls, and cash-flow reconciliations that he says no other fund he knows performs — but insists the decision collapses into one question: what is the single thing I need to believe about this company that makes me think it will keep being really big? If the answer requires three things to be true, it's too complicated and probably won't work; if it requires zero, there's no thesis. His examples are deliberately terse: Coinbase was 'crypto will keep growing' (buy the index on every cryptocurrency); Stripe was 'e-commerce will keep growing'; Anduril was 'AI and drones will matter for defense.' The heavy diligence exists to confirm the basics and disconfirm the belief, not to manufacture false complexity, and he refuses to waste founders' time on questions that don't bear on the core insight.
Origin
Gil developed this collapsing-to-one-question discipline across late-stage growth investing, where every deal is modeled to a 2-3x on paper and the real art is telling a 10x from a 0.5x.
Core principles
- 01Every investment ultimately hinges on one or two core beliefs, not fifty pages of modeling
- 02If it takes three things to be true, it's too complicated and probably won't work
- 03If it takes zero things, there's no real thesis
- 04Heavy diligence is still done — but it collapses down to the single question
How to run it
- 1
Do the real diligence
Meet the CFO repeatedly, walk the financial model, call customers, and reconcile cash flows for later-stage deals.
Pro tip Cash reconciliation catches things a model won't.
Watch out Diligence is to confirm basics and test the belief, not to generate 30 pages of questions that don't matter.
- 2
Name the one belief
State the single thing that must be true for the company to keep being big, in one sentence.
Pro tip 'Coinbase is an index on crypto and crypto keeps growing' — that terse.
- 3
Apply the count test
If the thesis needs three or more independent things to be true, pass; if it needs none, there's nothing there.
Pro tip One or two core insights is the sweet spot for a durable outcome.
Watch out Complexity in the memo usually hides the absence of a real thesis.
In the wild
Gil reduces major bets to single beliefs: Coinbase = an index on crypto that keeps growing; Stripe = an index on e-commerce that keeps growing; Anduril = AI and drones will be important for defense.
→ Each terse belief anchored a large, durable investment despite far more complex underlying analysis.
Common mistakes
The 50-page memo
Wrapping a decision in complex multi-page models and memos usually masks the lack of a clear core belief.
Wasting the founder's time
Asking 30 pages of questions about tiny products that don't bear on the thesis burns the team's precious time.
Is it for you?
Best for
Growth and late-stage investors, and anyone making a high-stakes bet that resists over-modeling.
Not ideal for
Situations genuinely governed by many independent variables where a single belief oversimplifies.
From the transcript
“What is the one thing I need to believe about this company that makes me think it's going to continue to be really big? If…”
“let's collapse it down into one or two core questions that help us understand if this thing will keep going, not here's the 30 pages…”
From the episode
#863: Elad Gil, Consigliere to Empire Builders — How to Spot Billion-Dollar Companies Before Everyone Else, The Misty AI Frontier, How Coke Beat Pepsi, When Consensus Pays, and Much More