This is a straw man. I said nothing like that.
I do, however, contend that falsification of a minor particular of evolutionary theory would in no way alter your adherence to its central tenets. That you believe it is possible for the whole thing to occur on another planet with different base components proves your test of falsifiability is disingenuous.
No, if there were silicon life forms on another planet that used silicon oxides as genetic material, and then on that planet a DNA-based organism were found evolution would also be falsified. Since the alien planet scenario is completely hypothetical, however, let's deal with what we can observe, namely life on earth. It is certainly theoretically possible to falsify evolution based on earthly observations. Just find that silicon-based creature. Or that pre-cambrian rabbit fossil.