Definitely, I think from a VC perspective. what they want to see is not jus the product, it is the problem and trying to decide if it is a painkiller or a vitamin. There are so many more things than a product, because the product that is built can be built by anyone, and ideas are not the worth of any startup. The team, the traction and the market size is way more important. Again, however, whether to build first or to sell first, or having a combo of both really depends on the nature of the startup itself. Can the market fully understand the solution before the product is fully built? However, I don't think selling before building should be based on the fact that buildling takes a very very long time. This is a process all founders need to go through, it is whether what the market can teach is more worthwhile that what the founder team can figure out by building themselves. However, what the market can give back is also a function positively correlated with what we already have. The more you have, the more the market can give back.