Great!
I'm in the middle of a war and a town is surrounded by enemies. To get better defense I have a great general in that city, but suddenly a great engineer appears and I'm told to do something about stacked units.
I could finish the wonder I'm building, but I have already built around 80% of it. But apart from that I cannot see any way to not have one of the great persons killed. Is there any solution to this?
And what would have happened if it was impossible to perform any action whatsoever with either of these great persons?
Best Answer
According to this thread it's possible in Civ 5 to change production to something else without losing the previous unit / building. Unfortunately while I do believe this should work I haven't played Brave New World and I've been playing Civ 4 and Civ 6 as well as 5 so I may be confusing which version it's possible in or this may have been changed.
Anyway, it should be possible to change your production to something else (preferably another wonder or an expensive unit or building) and speed the completion of that with your great engineer before switching back to the original wonder and letting it's construction finish naturally.