[Cal]

There is one church in each city, just like there is one church on earth and one church in the USA and one church in Texas and one church in Travis County.

But there is nothing in the Bible that says the one church in a city must be a "practical church," that is, one with a single tightly-coordinated set of leaders who recognize no other organizational entity but their own and expect everyone in the city to join and follow them. The Bible contains no such thought.

The Bible clearly identifies city churches. But it also identifies house churches, which introduces sufficient reasonable doubt on the city-church-only doctrine. There is no definitive text which says beyond a shadow of reasonable doubt there can be only one practical (meaning operationally organized on a regular basis) church per city. The thought is just not there, but rather must be assumed.

To assume a doctrine with such extreme and far-reaching implications (for assuming it is to invalidate 99.999% of churches on the face of the earth) is clearly much too much.

Add to this the fact that in its history the doctrine has plainly not produced any true oneness, but rather only a "oneness" of a personality sect, and you have sufficient reason to discard it as at best gravely flawed and most likely perniciously destructive.

As far as I'm concerned the horses have left the barn on this teaching. It's false. I recommend no one lose any sleep over it.