[Revolting cat!]

So, are you saying that the Beatles, since they’ve already been mentioned, ought to have sung, instead of “You Can’t Do That”, “You Can’t Do Which”?

[AnAmericanMother]

So, are you saying that the Beatles, since they’ve already been mentioned, ought to have sung, instead of “You Can’t Do That”, “You Can’t Do Which”?

Of course not! In that case, "that" is used as a pronoun rather than a conjunction for a dependent clause.

Or something like that. ;-p