1784, three years after Kant published Critique of Pure Reason (first edition, 178 1), he published an applied article "Answer this question: What is enlightenment (movement)" in the fourth volume of Berlin Monthly at that time. In the ninth issue of the same volume, the magazine published a similar article by mercy Mendelssohn, a Jewish philosopher, about "What is Enlightenment (Movement)"? ",according to Kant's small note when he later published his own article, if he had read this article, he would have withheld his own article. "Now this article is just to test the extent to which accidental performance brings two people's ideas together" [1].