Piergiorgio Odifreddi ( born July 13 1950 ) , is an Italian mathematician , logician , essayist and fond of the history of science . Piergiorgio Odifreddi ( born July 13 , 1950 in Cuneo ) , is an Italian mathematician , logician and aficionado of the history of science , who is also extremely active as a popular science writer and essayist , especially in a perspective of philosophical atheism as a member of the Italian Union of Rationalist Atheists and Agnostics .