Not really. But I trust we’d catch them if they cheat. Iran got caught cheating on the NPT twice, and that was before they became a major focus of so many intelligence agencies, before spy drones existed, and before the IAEA installed monitoring devices. Nuclear programs involve big, industrial processes and leave behind traceable material. They’re hard to hide.

If Iran cheats, we can try to get the world to reimpose sanctions. Or we could always bomb them. That’s the great thing about measures of last resort. You can always resort to them.

But there’s no evidence they’re cheating now. And since they know they’re being carefully monitored, they have a strong incentive not to cheat. They’ll surely try to get away with as much as they can without directly violating the agreement. But as long as it keeps a bomb out of their hands for the next decade or more, I’m pleased with the results.