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Eskow: This may be blue-sky thinking, but it occurs to me that the progressive movement can display leadership and vision in forming that front, at a time when those qualities seem to be lacking elsewhere.

Indeed, it may be some blue-sky thinking from a player, no matter how brilliant, who has not won a trophy in his career for club or country.

Blue-sky thinking started early in the development of AI.

James Ker-Lindsay, a Balkans expert at the London School of Economics, says "blue-sky thinking" is one way for European leaders to tackle the region's seemingly intractable issues.

To Mr Sisolak, innovation zones represent the blue-sky thinking needed to revitalise Nevada's tourism-reliant economy after the coronavirus pandemic.