Four quick queries

[Jivilov]

Almost certainly stumbled across answers to these in past research but forgot and can't find them now:

1) If you have Cathedrals in your cities do you lose the Cathedrals if you sell prerequisite Temples?
2) If your Pentagon city is destroyed does that mean your existing 4-unit Armies lose one unit each?
3) If you've built Pentagon and then have less than 3 Armies does that mean the Pentagon effect is void?
4) Can slave Workers build Airfields?

Thanks for your kind attention.

 

[tjs282]

1) If you have Cathedrals in your cities do you lose the Cathedrals if you sell prerequisite Temples?
2) If your Pentagon city is destroyed does that mean your existing 4-unit Armies lose one unit each?
3) If you've built Pentagon and then have less than 3 Armies does that mean the Pentagon effect is void?
4) Can slave Workers build Airfields?

(1) No
(2) No, but (I think) you won't be able to add another unit to any remaining 3-unit Armies until Pentagon is rebuilt.
(3) No
(4) Yes, Workers(Foreign) can do everything that native Workers can (just slower)

 

[CKS]

3) If you've built Pentagon and then have less than 3 Armies does that mean the Pentagon effect is void?

If you build the Pentagon and then lose some armies, the pentagon still works. However, if you are building the Pentagon and lose some armies (so that the total drops below 3), the build will change to something else and you won't be able to finish building it. This is unlike the behavior of most other builds, where you need the prerequisite to start building it, but not to finish it.