Molyneux problem

The origin of what is known as the Molyneux problem lies in the following question posed by William Molyneux to John Locke: if a man born blind, and able to distinguish by touch between a cube and a globe, were made to see, could he now tell by sight which was the cube and which the globe, before he touched them? The problem raises fundamental issues in epistemology and the philosophy of mind, and was widely discussed after Locke included it in the second edition of his Essay concerning Human Understanding.