I just checked the game stats, he had one fishing boat left (which you probably missed). So I quickly tested and apparently you are indeed still in the game when you only have 1 fishing boat. Mystery solved. I still find it weird that I didn't see anything after taking spies, but I guess I could ha...

But shouldn't spies and other stealth units be visible when you research spies? Otherwise that tech is pretty worthless after all. Might just be a bug, but a pretty annoying one.

So I just played a russians mirror on Yucatan, the guy tried a weird strat and it didn't work, it was pretty obvious I'd win quickly. However, he didn't resign and hid his villagers on the end of the map. I think fine, I won't give him his rating. Then I find all his vills and fishing ships, kill hi...