Branstorming session - No more Purpose - Time to stop.

Brainstorming
Kamal Ewisat
When it ends up that a person has nothing to say he is out of ideas and so its worthless to continue the issue with that one. So stop.

Brainstorming is in between Mindstorming and Blamestorming
Anthony Belon, Entrepreneur, Malaysia, Member
Before Brainstorming, it is normal for participants to ondergo Mindstorming (searching for ideas within self). After Brainstorming, Blamestroming can and may occur (putting blame on others).

End of Brainstorming Session
Chris, Netherlands, Member
I would suggest to have a break, and see if anything else comes up.
Sometimes it takes a bit more time to 'think in a different direction'.
A break, a short walk in the park, different setting after the break can do wonders!