What are some of the other related "Paul is dead" theories?

Question: What are some of the other related "Paul is dead" theories?

Answer: Some theories hold that Brian Epstein and John Lennon were both murdered in order to silence them and prevent their knowledge of Paul's death and the ensuing cover-up to reach the masses. (A few even go so far as to implicate Yoko Ono as a Japanese spy sent to make sure John stayed quiet!) Still others believe that Paul was not killed, merely replaced. In print and on the internet, when this subject is discussed, PIR refers to Paul Is Replaced, while PID refers to the original rumor.

Over the past few years, a new branch of the PID rumor has been discovered called "60if" (a reference to an earlier clue on the cover of Abbey Road). It maintains that George Harrison told the whole true PID story to friends years ago, and that the document he wrote, which has only now become available since his death in 2002, explains the entire process. In this document, "George" claims that the KKK kidnapped Brian Epstein -- who was both gay and Jewish -- in 1966 and that Paul was merely an unfortunate bystander, necessitating the death of both men. This is also sometimes referred to as TKIN (The King Is Naked) after a website that advances the idea.

There are also a larger number of Beatle fans who contend that the group started the hoax themselves, whether for publicity, to boost album sales for a non-touring band, or just for fun. All four band members and their associates categorically deny this.