Which session is this? (Revolver era) | Fab forum

Here's a picture from the Revolver sessions, with odd instrumentation. Paul is on his Epiphone Casino, George on a Burns Nu-Sonic bass, and John on his Gretsch Nashville. Which song are they recording?

Contenders:

Paperback Writer – The way I've heard it, Paul and John play the guitars, while George laid down a "guide" bass track that Macca later dubbed over. However, listening to Take 1, one can hear two guitars and no bass (This site claims that Paul & George played guitar, and John played the tambourine).

Rain – Possibly a similar scenario as above (J&P on guitars, Geo lays down a basic bass track that is later overdubbed), but it seems kind of odd to have Macca randomly play lead on a John song, and not even utilize George.

She Said She Said – The only Beatles song with just John, George and Ringo. Apparently, Paul stormed out after getting into an argument (Or a "barney" as he refers to it) with the band, and they proceeded to record this without him, with J&G on guitars, John on the Vox organ and George on the Burns bass. Could this possibly be from earlier in the day, before Paul left? (Though that doesn't explain the role reversal between Paul and George)

Anyone know for sure, or have any other theories?