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Whats the use?

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: : : What is the use of trading technologies if you still have to research them? : : : : You can also research technologies that you don't have pre-requisites for. Provided someone is willing to trade you that tech, of course. : : You can also get a pre-requisite by trade, and not actually research it at all, if it doesn't give you any thing you need.(Some tech's don't give you anything at all, but are only pre-requisites for what you do need.)

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