Fool me once, shame on you. Fool me 34985938479 times...

You live on the Moon?

The winds of winter do move slowly...

And if you need parts bigger than the replicator can produce, you just replicate the parts for a bigger replicator.

That's fair. Not everything is for everyone.

I'm not sure I agree. Replicators are basically just better 3D printers, and those are pretty readily available.

The way he says it implies he's not being entirely truthful.

BASHIR: So which department are you with? SLOAN: Let's just say I belong to another branch of Starfleet Intelligence. Our official designation is Section thirty one.

I don't think I've ever heard someone say, "let's just say," and had it been followed by a truthful statement.

Though at this point it's usually because the original actor is dead. Saavik, Alexander, and Ziyal were the only significant recasts for ages.

Jack getting into Starfleet and assigned to a ship so fast can be easily explained with Starfleet being low on people after the events of the show. Also, he's still an ensign, so he didn't get jumped through the ranks. His bridge position is also something that Seven gave him as a special assignment rather than a standard bridge position specifically because of his background. He's essentially a formalized version of Mariner's role on the Ceritos.