Interesting post in this Business Marketing Ideas blog.
"Have you been in a "brainstorming" session where each person just defended their own ideas? Worse is when people don't suggest ideas at all, for fear they'll be attacked. That's no way to brainstorm. Brainstorming is using the power of many minds, and ideas should flow freely and trigger other ideas. How do you make that happen?"
Maybe the problem with brainstorming is the starting context - the starting context is real life but instead maybe the an artificial context - within a story or movie for example - could be used as the starting context. Brainstorm participants would choose a context of a story and then imagine how the characters would brainstorm. This would help to 'switch off egos'.
I've also thought that using a movie context would be a good way to create lateral thinking provocations. Real-world limitations quickly interfere when forming provocations in a real-life context, but the context of a movie would allow more freedom of imagination.
(The original source of this article was valuablecontent.com)