Huh, really? Who asked that, out of curiosity? I never really found the "Jade didn't bring Derse" thing to be that big of a deal personally, but it's still sort of interesting. So they would be at the Battlefield, then? I mean, they'd get destroyed by the Reckoning but the chess guys have never been particularly smart.
Some random guy. No way to tell if he was lying, but why would anyone lie about a thing like that anyway.
The real answer is of course that it doesn't matter, and Hussie probably didn't even think about it at the time. There are Dersites on the battleship so obviously Jade wasn't planning to leave them to die or anything.