Ideating / Brainstorming on Startup ideas

I thought it would be cool to brainstorm with someone who may have a startup idea or just an idea and want to challenge them. It’s a process of nudging through the idea and challenging intellectually! I study about this stuff ( via Booth / online courses, research, YouTube , watching pitches etc) and thought to take it to next level!

tldr: premise is that you have a burning idea and think it is good. Maybe next step is to test it out!