Epistemology Properties for View of Knowledge on Constructivist

Constructivism emphasizes the learner's self-study,self-construction,emphasizing the students awareness of innovation,creativity and innovation ability,in line with the deepening of education reform and development.Radical constructivism thinks that knowledge is by no means an objective characterization of the real world,but only a reflection of the outside world in the interaction of people and situations;and asserted that people cannot be objective knowledge,it is impossible to be the world understanding.In the radical constructivism view,the world is unknowable,but also man-made.The paper argues that the world is knowable,and it is unknowable;the world is man-made,nor is man-made.This is the duality of subjective and objective for the understanding,which is the unity of opposites of subjective and objective on world essence.