Research vs Tax Rate Misunderstanding

[Catt]

Don't have the answer, but I think it is safe to say: (1) the ordinary free techs for scientific civs are Monotheism, Nationalism, and Rocektry; and (2) for some unknown reason, and only in very rare circumstances, a scientific civ will occasionally receive an alternate free tech.

From my own experience, I can rule out either cheapest or most expensive tech available (based on editor cost), and am also pretty comfortable ruling out cheaper or more expensive trade costs techs. An earlier thread which generated no answers but additional facts to throw into the mix here can be found by clicking HERE.

Catt

[theNiceOne]

Originally posted by Stuie
Alternately, you can switch to a tech for which you have not accrued any research on the turn prior to completing ToE. That tech will be free, then pick another with no accumulated research, get that for free, and then switch back to the one you were originally researching (which will pick up where you left off).

No you can't. When you switch away from a tech, you instantly loose all research done for that tech so far. The game only remembers how much you have reserached your current tech.

[campmajor!]

Yes, I had noticed that one as well a while ago. I tried to switch to an alternative tech to see how long it would take (the number of turns was not visible in the version i had then), and when I switched back to the tech I was researching before, it was all GONE!

So nowadays I do not switch anymore unless I just started researching!