Premise: Rock music is a genre of popular music that originated as `` rock and roll '' in the United States in the early 1950s , and developed into a range of different styles in the 1960s and later , particularly in the United Kingdom and the United States . Rock music also drew strongly on a number of other genres such as electric blues and folk , and incorporated influences from jazz , classical and other musical styles . Musically , rock has centered on the electric guitar , usually as part of a rock group with electric bass and drums and one or more singers . Typically , rock is song-based music usually with a 4/4 time signature using a verse-chorus form , but the genre has become extremely diverse .
Hypothesis: Rock music is music.
Label: ENTAILMENT