Gen. O'Neill and Prior-Daniel in “Unfinished Business”

You know, there's a bottom line here: Carter doesn't think it can be done.

Yes, it can. A Mk-9 beamed directly behind the gate in the Pegasus galaxy will destroy that gate, the wormhole connection will be broken.

How do you know that?

Hello!? Merlin!

[mockingly] Oh yes. [in "spooky" voice] Merlin!

[frustrated] Jack, I wish I had proof. I wish I had a way to convince you, but I don't. Now this was the only choice I had and I took it. It's a good plan, it-it just happens to hinge on you guys believing in me, having a little faith. Now, I thought you of all people might!

Why!? You of all people should know that, I don't believe anything anybody says, even if I understand what they're talking about!