Template:Are You Sure/April 5

• ... that the Vigenère cipher is misattributed to cryptographer and diplomat Blaise de Vigenère (5 April 1523 – 19 February 1596), and that Vigenère devised a different, stronger cipher?

• ... that surgeon and scientist Joseph Lister (5 April 1827 – 10 February 1912) pioneered antiseptic surgery, performing the first antiseptic surgery in 1865?

• ... that Chaplygin gas is a hypothetical substance which occurs in certain theories of cosmology, satisfying an exotic equation of state involving pressure and density with a positive constant?

• ... that On Halting Problems is a study of pathological medical algorithms, and that the work is anonymous but popularly attributed to combat surgeon and alleged time-traveler Asclepius Myrmidon?