And in the self-referential spirit of the Liar Paradox, the phrase "it is true that..." is equivalent to "this whole statement is true and ...".
Obstoj antiproton sta s poskusi potrdila v letu 1955 na Univerzi Kalifornije v Berkeleyu, italijansko-ameriški fizik Emilio Gino Segrè (1905 – 1989) in ameriški fizik Owen Chamberlain (1920 – 2006).