A critical study about the cognosciblism and the agnosticism in history of philosophy is made to unify the contradiction on the basis of the reconsideration about thinking and existence.

• 本文通过对哲学史上出现的各种可知论和不可知论进行批判性的考察，试图在重新理解思维和存在的基础上，把二者统一起来。