took nine hours to rehearse and record, complete with overdubs, making it the only song on Revolver to be made in a single session. After the subsequent mixing session, the Beatles' producer, George Martin, said: "All right, boys, I'm just going for a lie-down." The creative cooperation among the four Beatles was at its highest during the Revolver period. There nevertheless remained a philosophical divide between McCartney and Lennon, Harrison and Starr due to McCartney's refusal to try LSD. McCartney took part in the early takes for "She Said She Said" but did not contribute to the finished recording. He recalled: "I think we had a barney or something and I said, 'Oh, fuck you!,' and they said, 'Well, we'll do it.' I think George played bass." Harrison played a Burns bass guitar, which he had used earlier in the Revolver sessions, during initial recording for "Paperback Writer". Harrison also contributed the lead guitar part, incorporating an Indian quality in its sound and providing an introduction that Riley describes as "outwardly harnessed, but inwardly raging". Case describes the recording as "a metallic spiral of guitar and drums as aggressive as anything by the Who or the Yardbirds". According to McCartney biographer Barry Miles, logs from the recording session appear to contradict McCartney's statement, as they do not indicate any bass overdubs by Harrison. Some authors therefore state that McCartney taped a bass track before walking out, on the same track as Starr's drums. In his 2012 book on the making of Revolver, however, Robert Rodriguez comments that the stereo mix of the song puts the bass and drums on separate channels – showing that the two contributions were not recorded together on the same track, which the logs suggest – and the bass part has little in common with McCartney's playing style or sound. He concludes that the session logs must be wrong and Harrison's role as bassist on "She Said She Said" is "pretty well certain". In his liner notes to the 2022 Revolver: Special Edition, archivist Kevin Howlett states that "It is pretty certain... that Paul is heard on the original rhythm track containing bass and drums". He instead suspects that the argument related to a disagreement over the song's arrangement during the overdubbing process, adding that a recording sheet for the session indicates that a piano contribution was included on the song before being wiped from the