If a Treachery card says to add a Basestar or civilian ship but none are left in the supply, is one still added?

Question

Accepted Answer

A Basestar is added if one is available. A civilian ship is not added when none are available, because all of them are already in play or removed from the game.

Battlestar Galactica: The Board Game

If a Treachery card says to add a Basestar or civilian ship but none are left in the supply, is one still added?