About yesterday

A struggling musician realizes he is the only real person on the planet who can remember The Beatles right after waking up within an alternate fact where they in no way existed.

So there is certainly leakage there. Then I mentioned I'd do a string quartet. The musicians objected to playing with headphones, so I gave them Paul's voice and guitar on two speakers possibly aspect of their microphones. So there's leakage of Paul's guitar site and voice over the string tracks.

After recovering, he sings the Beatles tune "Yesterday" for his pals and discovers they have not heard of the Beatles.