This line of thinking is a real ..... from the past. It's kind of radical and very different from past mindsets.

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This line of thinking is a real ..... from the past. It's kind of radical and very different from past mindsets. (*) break (*) breakdown (*) breaking (*) breakup

This is a companion discussion topic for the original entry at https://english.best/questions/19562,this-line-of-thinking-is-a-real-___-from-the-past-its-kind-of-radical-and-very-different-from-past-mindsets/