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By Harrie de Swart. Harrie de Swart has almost fifty years of experience in teaching Logic in all its aspects at three different universities. Apart from logic, also the theory of social choice belongs to his research interests.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.