What does 사이비 (似而非) literally mean?

 ANSWER: "the same (似) but (而) not (非) [the same]"

My Korea-English dictionary defines 사이비 (似而非) as "pseudo-," "quasi," "sham," and "pretended," but the word is a phrase that literally means "the same (似) but (而) not (非) [the same]." It is an abbreviation of 사시이비 (似是而非), which literally means "like (似) this (是) but (而) not (非) [this]."

From Dong-A's Prime Korean-English Dictionary