Question: Are both Greg Graffin and David Paton bass players?
Context: Bad Religion is an American punk rock band that formed in Los Angeles, California, in 1980.  They make extensive use of three-part vocal harmonies (which they refer to in their album liner notes as the "oozin' aahs") and guitar solos, and are known for their lyrics, which cover topics such as criticism of religion, political commentary and society in general.  The band's lineup has changed several times over its lifespan, with lead vocalist Greg Graffin being the only consistent member; the current lineup, however, features three of the band's four original members (Graffin, Brett Gurewitz and Jay Bentley).  To date, Bad Religion has released sixteen studio albums, two live albums, three compilation albums, three EPs (one of which is composed of covers of Christmas songs) and two DVDs (which were both recorded live).  They are considered to be one of the best-selling punk rock acts of all time, having sold over five million albums worldwide. Along the Way is the first live concert DVD from punk band Bad Religion.  The concert footage was taken from fourteen different European stops on their 1989 tour for the album, "Suffer".  It was originally released on VHS in Germany in 1990 (with a different cover) and in the United States in the following year, and on DVD for the first time in 2004, coinciding with the reissues of the band's pre-"Recipe for Hate" albums.  Both the VHS and DVD have the same cover shown on the right, which depicts Jay Bentley with his bass, while the European VHS depicts guitarist Brett Gurewitz and singer Greg Graffin singing along with each other. Gregory Walter Graffin (born November 6, 1964) is an American punk rock singer-songwriter, multi-instrumentalist, college lecturer, and author.  He is most recognized as the lead vocalist, songwriter, and only constant member of the noted Los Angeles band Bad Religion, which he co-founded in either 1979 or 1980.  He also embarked on a solo career in 1997, when he released the album "American Lesion".  His follow-up album, "Cold as the Clay" was released nine years later.  Graffin obtained his PhD in zoology at Cornell University and has lectured courses in life sciences and paleontology at the University of California, Los Angeles and evolution at Cornell University. Cold as the Clay is the second solo album by Bad Religion's vocalist Greg Graffin released on July 10, 2006 in Europe, and the following day in the USA.  It was released on the label ANTI- (a sublabel of Epitaph Records).  It follows on from Graffin's 1997 release of "American Lesion". David Paton, MD (born August 16, 1930) is a retired full-time ophthalmologist best known as Founder in 1970 of Project Orbis (now named Orbis International, Inc.) and thereafter as its first Medical Director helping to develop (1970–1982) and then deploy its teaching aircraft for ophthalmologists worldwide, especially in the developing nations.  The initial aircraft was a donated DC-8 refurbished to contain an operating room, a teaching classroom and the necessary ancillary components for sharing “live” both surgical and medical techniques with colleagues abroad who were eager to learn by means of hands-on instruction.  The instruction was provided by volunteer American and other skilled medical teachers from an eventually large number of countries.  In 1988, the DC-8 was replaced by a larger and more complete teaching aircraft complex, housed in a formerly commercial DC-10.  Thus far 88 countries have been visited, some repeatedly.  By 2012, still another update of the Orbis aircraft will be prepared to further fulfill the various purposes of teaching optimal eye care internationally, principally by means of doctor-to-doctor techniques.  Paton resigned from Orbis in 1987 and focused on other aspects of academic ophthalmology, but in 2011 he returned in a voluntary capacity to assist in fund raising for a new annual appointment, the David Paton Orbis Fellowship in Global Ophthalmology Bad Religion is an American punk rock band from Los Angeles, California.  Formed in 1980, the group originally included vocalist Greg Graffin, guitarist Brett Gurewitz, bassist Jay Bentley and drummer Jay Ziskrout.  Ziskrout left the band halfway through the recording of their debut full-length album "How Could Hell Be Any Worse? " and was replaced for the rest of the sessions by Pete Finestone.  1983's "Into the Unknown" featured bassist Paul Dedona and Davy Goldman, both of whom left after the album was released.  Bad Religion briefly broke up in 1984, as Gurewitz left the band to focus on his record label Epitaph Records and recording studio Westbeach Recorders, before returning with guitarist Greg Hetson, bassist Tim Gallegos and drummer Finestone for the 1985 EP "Back to the Known". David Paton (born 29 October 1949, Edinburgh, Scotland) is a Scottish bassist, guitarist and singer. David Hidalgo Jr. (born August 30, 1984) is an American drummer currently playing in Social Distortion.  Hidalgo replaced former drummer Scott Reeder, who had been busy with his main project Fu Manchu.  Prior to joining Social Distortion, he played drums in The Drips and Suicidal Tendencies.  He also plays drums for The Bronx/Mariachi El Bronx and the hardcore punk band Bullet Treatment with a variety of lineups that also included members of Rise Against, The Bronx, Cancer Bats, Anti-Flag and others.  David also toured with Brody Dalle in her Spinnerette and self-titled projects.  He has recorded and toured with Chuck Ragan and Dave Hause.  Most recently, Dave recorded on Greg Graffin's new solo record.  He is the son of David Hidalgo, guitarist and singer of Los Lobos. American Lesion is a solo album by Greg Graffin, the lead singer of the punk band Bad Religion.  Like the album "Into the Unknown", this album is a massive departure for Graffin, whose songs generally revolve around loud guitars and harmonies.  "American Lesion" for the most part features Graffin's voice alone, and each song features acoustic guitar or piano rather than electric guitars.  The song "Cease" (track 6 on this album) is a slow piano ballad that is also featured on Bad Religion's album "The Gray Race" as a fast-paced punk rock song.  The album was re-released by Epitaph Records on September 15, 2008. The discography of Bad Religion, an American punk rock band, consists of 16 studio albums, two live albums, four compilation albums, one box set, two extended plays (EPs), 29 singles, five video albums and 23 music videos. Formed in Los Angeles, California in 1980, the band originally featured vocalist Greg Graffin, guitarist Brett Gurewitz, bassist Jay Bentley and drummer Jay Ziskrout, who released their self-titled debut EP in February 1981 on Gurewitz's label Epitaph Records.  Pete Finestone replaced Ziskrout before the release of the band's full-length debut album "How Could Hell Be Any Worse? " in 1982.  The following year's "Into the Unknown" featured bassist Paul Dedona and drummer Davy Goldman, before Bentley and Finestone returned to the band and Greg Hetson joined as second guitarist.
Answer: no