blue-sky thinking
Thinking that is not limited to commonly accepted norms or beliefs. Everyone said Einstein was a fool when he was growing up, but his blue-sky thinking led to some of the greatest scientific advances of his time.
blue-sky thinking
Blue-sky thinking is when people try to find completely new ideas. In an admirable piece of blue-sky thinking, the party has begun attracting supporters from the world of fiction. This meeting will help us do a little blue-sky thinking.