Utovu wa vyote ni wazo la falsafa na la teolojia linalojaribu kueleza hali ya kufikirika iliyo kinyume cha ile iliyopo, ambayo ni ya kuwepo vitu vingi katika ulimwengu unaoonekana, mbali na vingine vinavyoweza vikasadikika kuwepo, kama vile roho. Katika hisabati, hilo linawakilishwa na tarakimu sifuri. The Nothing That Is, Robert Kaplan Il Nulla Archived 4 Machi 2016 at the Wayback Machine. In Search of a Cyclops, Fredrick Schermer Zero Archived 16 Julai 2007 at the Wayback Machine., Charles Seife The Hole in the Universe Archived 13 Oktoba 2007 at the Wayback Machine. K. C. Kole