Yes, that should work. You can use ORs in the req formula, since it is a boolean logic conditional evaluation. It's a little more clear with the other way, but you can build much more complex requirement possibilities with the inline ORs and ANDs (as well as NORs and NANDs with NOT; exclusive techs, oh my!).
Imperator Fyron said:
(as well as NORs and NANDs with NOT; exclusive techs, oh my!).
Could make a nice combination between ecology and nuclear weapon. The first one you discover make you unable to research the other.
Same with Light and Darkness powers [img]/threads/images/Graemlins/Cold.gif[/img]