A very special island is inhabited only by knights and knaves. Knights always tell the truth, and knaves always lie.

You meet five inhabitants: Abe, Bart, Peggy, Joe and Bob. Abe says, At least one of the following is true: that Bob is a knight or that Peggy is a knight. Bart tells you that Peggy and Abe are knights. Peggy tells you, Either I am a knight or Abe is a knight. Joe claims that it's not the case that Bob is a knave. Bob tells you that both Peggy and Bart are knaves.

Can you determine who is a knight and who is a knave?