When it comes to generating truly innovative ideas, deep expertise in a field can actually be a drawback. Cross-pollination from seemingly unrelated fields can lead to authentic breakthroughs. No silly stuff. The silence that followed was deafening. Silly is important.
Wild ideas are welcome.
Brainstorming should be fun. Write down everything. Obsessive note taking is toxic to brainstorming. It shifts the focus to the wrong side of the brain. It makes the session feel like History 101.