4. Sales matters just as much as product. - Peter Thiel

So when thinking about what kind of company to build, there are two distinct questions to ask: What secrets is nature not telling you? What secrets are people not telling you?

To anticipate likely sources of misalignment in any company, it’s useful to distinguish between three concepts: • Ownership: who legally owns a company’s equity? • Possession: who actually runs the company on a day-to-day basis? • Control: who formally governs the company’s affairs?

The perfect target market for a startup is a small group of particular people concentrated together and served by few or no competitors. Any big market is a bad choice, and a big market already served by competing companies is even worse. This is why it’s always a red flag when entrepreneurs talk about getting 1% of a $100 billion market. In practice, a large market will either lack a good starting point or it will be open to competition, so it’s hard to ever reach that 1%. And even if you do succeed in gaining a small foothold, you’ll have to be satisfied with keeping the lights on: cutthroat competition means your profits will be zero.