Premise: Black Sabbath were an English rock band , formed in Birmingham in 1968 , by guitarist and main songwriter Tony Iommi , bassist and main lyricist Geezer Butler , singer Ozzy Osbourne , and drummer Bill Ward . Osbourne 's regular use of alcohol and other drugs led to his dismissal from the band in 1979 . The band helped define the genre with releases such as Black Sabbath ( 1970 ) , Paranoid ( 1970 ) and Master of Reality ( 1971 ) .
Hypothesis: Black Sabbath formed in 1988.
Label: CONTRADICTION