A: We’ve had this question in several different forms so far, so I’m tweaking it to make it generic. It really could go either way in our minds, but this was the original ruling, so we’re going with our previously set precedent.

Assuming all other conditions are already set correctly (Goal in place, other Keeper already played) the Keeper you’re playing for the win would be in front of you for a split second before it would have to be discarded, and that split second is long enough for you to meet Goal conditions and win.

Examples:

Winning with a Goal which requires Bruce Wayne, but Batman is already in play.

Winning using Saffron or Yolanda when Bridget is already in play.

Winning with a by playing a Doctor if a later Doctor is in play with the Blinovitch Limitation Rule in effect.