Answer by taking a quote from the following article:

Nomeansno (sometimes stylized as NoMeansNo or spelled No Means No) was a Canadian punk rock band formed in Victoria, British Columbia and later relocated to Vancouver. They issued ten LPs, one collaborative LP, numerous EPs and singles, and gained an international audience following extensive touring. Critic Martin Popoff described their music as "the mightiest merger between the hateful aggression of punk and the discipline of heavy metal."

The Infamous Scientists disbanded, and their guitarist and vocalist Andy Kerr joined Nomeansno in 1983. Kerr brought a distinct hardcore punk edge to Nomeansno's sound, creating a buzz-saw guitar tone by playing through a Fender Bassman amplifier and a P.A. speaker. Nomeansno became a fixture in the British Columbia punk scene despite playing music which did not always conform to punk rock standards. The You Kill Me EP in 1985 on the Undergrowth Records imprint exhibited their experimental sound on dark and ponderous songs like "Body Bag" and a "tuneless" cover of "Manic Depression" by Jimi Hendrix. The three also began performing Ramones covers and more traditional punk music as The Hanson Brothers, a side project which would later receive more of their attention.  Issued initially by the Montreal punk label Psyche Industry, the band released Sex Mad, their second LP and first with Kerr. The album further expanded the band's experimental and progressive punk sound, yielding the single "Dad". The song was a minor college radio hit, which AllMusic reviewer Adam Bregman called "a bit chilling, even though it's spit out at slam-pit's pace". Kerr, the song's lead vocalist, increasingly became responsible for lead vocals as Rob Wright suffered from nodules on his vocal cords. They soon signed with the seminal punk rock label Alternative Tentacles, run by Jello Biafra of the Dead Kennedys. This, along with frequent touring in North America and Europe, helped the band to garner a larger audience.  In 1988, the group issued two releases which were recorded with producer Cecil English: The Day Everything Became Nothing, an EP, and the Small Parts Isolated and Destroyed album. Alternative Tentacles compiled the two together on a single CD, The Day Everything Became Isolated and Destroyed. AllMusic reviewer Sean Carruthers called the experimental recordings "less aggressive" than, but nonetheless worthy of, the band's previous efforts.

Did they write their own songs?