Premise: AC/DC are an Australian rock band , formed in 1973 by brothers Malcolm and Angus Young . A hard rock/blues rock band , they have also been considered a heavy metal band , although they have always dubbed their music simply `` rock and roll '' . Producer Rick Rubin , who wrote an essay on the band for the Rolling Stone list , referred to AC/DC as `` the greatest rock and roll band of all time '' .
Hypothesis: AC/DC is only a polka band.
Label: CONTRADICTION