狠狠撸shows by User: alamindhrobo / http://www.slideshare.net/images/logo.gif 狠狠撸shows by User: alamindhrobo / 狠狠撸Share feed for 狠狠撸shows by User: alamindhrobo https://public.slidesharecdn.com/v2/images/profile-picture.png Experience is therefore our first instruction.....But though all our knowledge begins with experience. it does not follow that it all arises out of experience. ''Philosopher Kant''