Even putting up totally wacky ideas on a white board or flip chart, where all can see them, could end up inspiring, by the end of the meeting, the most workable solutiion. Many companies pay lip service to the idea that it's OK to fail, make mistakes, get things wrong. Yelling, recriminations, weeping, wailing, probation and parole. Instead, truly creative managers invite open discussion of mistakes and failures on the theory there's always a lesson to be learned from them. Risk-taking, after all, by definition, means sometimes you win and sometimes you lose.
Failure is understood as one possible outcome in the overall game.
When creative managers truly understand this, they exhibit their support of it in extraordinary ways. One of Henry Ford's VPs once made a colossal inventory error, for example, that cost the pioneering car company over one million dollars, a lot of bread back in 1920. Assuming he would be fired anyway, the VP wrote up his resignation and handed it over to his boss. Henry Ford the First looked at the piece of paper, then tore it up on the spot. My boy, I've just invested one million dollars in your education.