Answer (1 of 14): The term “continuity error” gets thrown around a lot in reference to Trek, oftentimes erroneously.
Some of the most famous “continuity errors” can be explained with a little imagination and common sense.
WHY DOES KHAN KNOW CHEKHOV IF CHEKHOV WASN’T INTRODUCED TO STAR TREK UNTI...
I think he refers to the first season of DS9 where it was never explicitly mentioned that Joseph Sisko is well and alive (but neither was the opposite). He first appeared in season 4. He just doesn’t exist before that.
I never even thought about that.
He was alive and well running a successful restaurant back on Earth on Ben is out on some backwater post talking about him like he’s dead.