OK, this caused much debate tonight and I couldn't really find anything in the rulebook to settle this. Cain's powers has her flip over two civilian ships. Can those two ships already be on the board?

pg. 7 of the Pegasus rules:

Destroying Civilian
Ships
When a player is instructed to “draw a civilian ship to destroy”
(such as by Helena Cain’s Blind Jump ability or by the “Misjump”
Destination Card), draw a random civilian ship token from
the tokens not currently on the board and destroy it. If all
remaining civilian ships are currently on the board, the current
player may choose any civilian ship on the board to destroy.

Yep, I had a chance to read the rules more leisurely and I saw it myself, but thanks!