I'm really afraid I'm missing something obvious here, but I'm worried that neither "whether" nor "indeed" work very well in many contexts. It seems to me that testing trueness exists in so many contexts that it's going to be hard to find an English word that fits all the important ones.
Additionally I question whether this is truly a case improving to the point of least surprise? After all, I don't know a programmer who's going to be surprised by what true means. There are still *some* things you may have to learn in software dev 101 ;)
Marcus
