Re: Yesterday's Enterprise timeline
^ Not necessarily. Alt-Yar came from an alternate timeline, yes. And if she had stayed in that timeline, then she would have ceased to exist. But she did not. She was taken out of that timeline. Therefore she continued to exist.
Sweet dreams are made of cheese
Who am I to diss a Brie?
I Cheddar the world and the Feta cheese
Everybody's looking for Stilton