What You Discover May Not Be to Your Liking
Sometimes, you'll look at the results of the research you've done and realize that things don't look promising.
Perhaps there aren't as many customers for your product as you first assumed, development is going to be harder, or you've found a competing product you didn't know about before. Perhaps the task you estimated would take 2 days is going to take longer than a week.
You need to decide what you're going to do about that. The worst way to do this is by ignoring the problem: you're relying on luck or on faith to get you through. You're cleverer than that; you can think of a plan to overcome the problem.
Personal Experience
One of the first software projects I worked on had a team of three developers, none of whom had much experience with the technology we were using, and two of whom (myself included) didn't really have much experience of anything.
As we progressed with the project, we found that...