Hans Jansen
Johannes Juliaan Gijsbert "Hans" Jansen[a] (17 November 1942 – 5 May 2015) was a Dutch politician, scholar of contemporary Islam and author.At the age of 17, Jansen began studying theology at the University of Amsterdam, yet changed the subject after one year to Arabic and Semitic languages.[2] Jansen taught at the universities of Groningen, Leiden and Amsterdam, and was director of the Dutch Research Institute in Cairo.[1] While busy with his university studies, Jansen was member of a leftist group and left the room in protest when somebody mentioned the word "Israel".Jansen reveals self-contradictions, contradictions to other historical sources, embellishments by later authors, politically or theologically motivated distortions of the depiction, symbolic meanings of allegedly historical names, literary construction of the depiction according e.g. to biblical models, and chronological and calendrical incredibilities.Many Islamic traditions came into being long after Muhammad on the basis of mere guesses for what situation a Quranic verse had been revealed.