How to Understand a Priori Knowledge

Basically,a priori knowledge is independent of experience.The distinguishing features of a priori knowledge are the absence of perceptual experience as a ground or reason to believe and the presence of such non-perceptual reasons to believe as intuition,reasoning,reflection,etc.Based on the discussion of Kant's concept of the a priori knowledge by a number of philosophers nowadays,My aim in this thesis is to respond to Kant's view of a priori knowledge and discuss its characterizations in positive way and negative way.Besides,the property of unrevisability is also involved in it.Arguing a priori justification as the nature of a priori knowledge,this thesis is trying to give the a priori contemporary characters.The conception of a priori justification gives us a better appreciation of the respective merits of the a priori and experience,as well as a better understanding of how experience comports,at least in principle,with the a priori.