 On 7 July 1688 the Irish scientist and politician William Molyneux (1656–1698) sent a letter to John Locke in which he put forward a problem which was to awaken great interest among philosophers and other scientists throughout the Enlightenment and up until the present day. In brief, the question Molyneux asked was whether a man who has been born blind and who has learnt to distinguish and name a globe and a cube by touch, would be able to distinguish and name these objects simply by sight, once he had been enabled to see.