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Howdy. I have a technical question. Suppose I discover a tech and complete a unit on the same turn. This tech upgrades the unit. So, what happens first, tech resolution or construction? If it's tech, the unit (that is, production) is automatically upgraded. If it's construction, then I get the old unit that I need to upgrade manually (and at a cost). So, which is it?

Both increasing bulb count -> gaining tech, and upgrading productions happen at the same iteration over all cities of the player. So, I'm inclined to say this is "undefined" (it's possible that some of your cities producing similar unit gets their production upgraded while others not, on the very turn tech is gained)