They have all the important bits.
Also can you imagine what a farseer could do with her mind if she was trying to MAKE YOU HAPPY as opposed to MIND BULLETS
It's like jedis masturbating with the force. Opens your eyes in an unpleasant but slightly arousing way.
LIVI is just one step ahead. Honestly, the last thing you would want to do with an Eldar is have a baby, bahahaha.
THAT BEING SAID
READ IT AND WEEP.
... after 20m of searching through my pictures and googling I cannot goddamn find the picture. Someone else will post it.
Chief Librarian Astropath Illiyan Nastase (Now THATS a title)
912/M41 Illiyan Nastase, the son of a human mother and an unknown eldar mercenary, is born on Badab following the expulsion of the Tyrant. He will eventually become the Chief Librarian. (WD 97, p. 46)
(I mean human mother and ANCIENT fluff but I'm just saying)
Edit:: putting a picture anyways