David Hume's An Enquiry Concerning Human Understanding

Part I of Essay
In David Hume's seminal epistemological work, Section II (in An Enquiry Concerning Human Understanding), "Of the Origin of Ideas," wherein David Hume outlines, with uncommon sharpness and uncanny skill, not only what he believed to be the true origin of what we call ideas, ....

Part II of Essay
.... and so on. His argument to this is that, he says, take a blind or deaf man that has been blind or deaf since birth. They cannot picture color or sound, though they have the natural capacities for such. They simply lack the necessary "impression" of sound or color, as so they can visualize and manipulate these concepts with their imaginations. These all seem like good philosophical argumentation, and are highly convincing, except for one seemingly overlooked flaw. Later on in "… Ideas" Hume states "those who would assert that this ....