Depends on the context. We certainly knew nobody else had nukes.

That.. was the case for all of four years. And forgive me if I doubt certainity.

	▲	0x3f 3 hours ago \| parent [-]
		Four years is plenty of time to start launching. Also, MAD incentivizes disclosure. What would be the point of having secret nukes? Openly having them is the only way to stop the US using its nukes to stop your nuke program, in this scenario.