Great idea ? start with divergence first, and then convergence

“When brainstorming, the game is all about getting out as many ideas as possible. Crazy ideas. Infeasible ideas. Just get them all out there. Idea generation is about divergence. As tempting as it can be, don’t critique any ideas until they are all out there.
Once you have done that, it is time to filter the ideas down (convergence). Put your business hat on and throw out bad ideas. Remember, the only way to get down to a great idea is to start with divergence first, and then convergence.”

Excerpt From: Jason Barron. “The Visual MBA.”