By Damodar Prasad Das
It was a momentous winter’s day when Descartes sat down with the sole intention of demolishing all of his opinions. Descartes began by rejecting all knowledge gained from the senses, as the senses sometimes deceive. He concluded that whereas the empirical sciences can be classed as dubious, the abstract sciences such as arithmetic and geometry cannot. However, so determined was he to call into question all of his knowledge, that he conceived of a cunning and powerful demon, who was exerting all of his power to deceive him, even in matters related to the abstract sciences.