noun
a type of thinking that is creative, forward-looking, and unconstrained by conventional ideas or limitations
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In order to come up with innovative solutions, we need to engage in some blue sky thinking.
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Let's do some blue sky thinking and brainstorm some crazy ideas.
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Time to get our heads in the clouds and do some blue sky thinking.
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When it comes to problem-solving, sometimes you need to engage in some blue sky thinking to find the best solution.