[jaredsohn]

I don't think this is stating that (or what other responses to the parent say). Rather it is saying, figure out what the biggest risk is and try to address that first. Often for startups this will be on the business side (i.e. are you building something people want? Is the market big enough? etc.). But if what you're building requires complex engineering, requires that an API you're unfamiliar with works a certain way, requires that certain data is available to you, etc. it is helpful to also investigate these things early on so that you can be more confident of your project's feasibility and can estimate better.