Were Napoleon and George Boole alive at the same time?
Yes. Napoleon and George Boole were alive at the same time for 5 years, from 1815 to 1821.
Napoleon was 46 when George Boole was born.
George Boole was 5 when Napoleon died, aged 51.
Napoleon
French military leader, French Emperor 1804–1814 and again in 1815
Born 15 August 1769 · died 5 May 1821, aged 51
George Boole
English mathematician, philosopher and logician
Born 2 November 1815 · died 8 December 1864, aged 49