Stargate SG-1, Season 9

[regarding the anti-Ori weapon]

Lt. Colonel Mitchell:
Hey, has anyone stopped to figure out how this thing might work? I mean, how do you kill something that's pure energy?

Dr. Jackson:
Well, Merlin's research said nothing about killing. A more accurate translation would be "neutralize" or "cancel out".

Lt. Colonel Mitchell:
Well, that still begs a lot of questions. How do you aim at something you can't see?

Dr. Jackson:
Clearly, it can't be a weapon in the conventional sense. See, ascended beings transcend ordinary space time as we know it. This device would have to do the same thing.

Lt. Colonel Mitchell:
In other words, you have no idea what it might be.

Dr. Jackson:
Yeah, pretty much.