Problem Solution Clarity
occurs multiple times during development work
This is the alignment between the current image of the problem and the current image of the solution, which allows you to go deeper in both directions that of the problem space and the solution space. You already are at a product form stability, but it's not enough. Enough to solve for marketing, distribution, margins, scale... So you need to expand the problem you solve and solution you will devise.
Product as a Solution
It's really difficult humanly to create a mindful picture about what your product as a solution solves. I have found internalizing by lying down and thinking of different parts of the product as a way to come to this understanding. It's a desire to know mixed with requirements you identified that guide this understanding in the hope of bettering the product construct.
in writing...