Certainly good advice but it may leave HN readers with the idea that hiring a VP of Sales person early is enough. Blank explicitly rejects this and suggests that early sales are the responsibility of the founders. In particular they have to treat their product as a hypothesis, which few successful sales folks are able to do. They treat objections as something to overcome. Only the founders can balance the question of whether they are talking to the right prospects with the right message about the right features.
My apologies. What follows is only a portion of what's in the talk.
1. The founders must sell. They must listen to prospects.
2. They cannot hire a VP of sales until they have learned how to sell the product.
3. The founders should view their business as a guess.
4. They can see if they are correct by selling, which will confirm:
a. Who the customer is (who will pay for the product)
b. How to talk about the product
c. If product has the right features
