FTP, name this treatise that introduces the concept of the "tabula rasa," the major epistemological work of John Locke.
One of this work's key points is illustrated by an Indian who can't remember what supports a turtle ridden by an elephant.  Its second book features thought experiments like the grinding of an almond and the destruction of a shaft of wheat which brings to light the relationship of an altered object with its full perception, which the author elaborates in his reply to the Molyneux Problem.  In its third book, the author attacks the abuse of language inherent in the Scholastic perception of "the essence," citing a disconnect of the word with its idea.  Its first book contains the observation that children possess no mutual assent to a set of knowledge, thus refuting Descartes's doctrine of innate ideas.  FTP, name this treatise that introduces the concept of the "tabula rasa," the major epistemological work of John Locke.
One of this work's key points is illustrated by an Indian who can't remember what supports a turtle ridden by an elephant.  
An Essay Concerning Human Understanding