hey! in my opinion, i think all of ya'll r wrong! i think that... after Syd disappeared, Vaughn wuz soooo depressed & heartbroken, that Alice (or w/e hiz ex'z name iz...) went & comforted him, & he thought that he fell back in love w/her, so they got married, & so, when Syd found out, she wuz so totally heart-broken that she quitz the CIA, goez 2 her mom & Sark, & fulfills the prophecy (don't u remember when her mom told her that it wuz her [Syd] in Rambaldi'z manuscriptz????)... & also fallz in love w/Sark, 'cuz, how could she not??? he'z HOT!