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工具變量的美妙之處在于它們讓我們以新的視角看世界。

We don't inherit the earth from our ancestors; we borrow it from our children. This truth guides every decision we make.

歷史實際上不過是人類罪行、愚蠢和不幸的記錄冊。

The Moving Finger writes; and, having writ, Moves on: nor all thy Piety nor Wit Shall lure it back to cancel half a Line, Nor all thy Tears wash out a Word of it.