You won’t know, not for sure.
There are no guarantees, no way of knowing one hundred percent if you have got the right answer.
Will that idea that is rattling around your head work?
Will that idea that makes you lose sleep work?
There is only one way to know and that is to press play, to hit publish, to set up your stall, to deliver to your first customers, to take your first feedback and that is the opportunity.
You have the chance to try and to fail or to succeed, if not this time, the next one, or the one after that.
How will you ever know unless you work hardest of all on getting it out there?
Unless your idea is a revolutionary new pacemaker, there is room to make your very best guess and there’s still time to change things tomorrow, after you launch.