TMBTM said:

Ghost said:

But wouldn't Bens line in ANH "A young Jedi named Darth Vader, who was a pupil of mine until he turned evil" give it away? Or at least the idea of it.

Damn, you have a strong point here... I feel ashamed not having thought about it.

That is really no argument at all - Ben also told Luke half truths and flat out lies - ie: that Vader murdered anakin.- When he apparently KNEW otherwise.

Ben later told Luke about Anakin ceasing to be himself and becoming Darth Vader - In regards to this earlier quote above - he could simply have been stating similar circumstances - or at least events to his knowledge.

Did he know of another fallen Jedi who took up the VADER mantle?