Neville ChaimBerlin:
“To be clear, this is the Manhattan/Brooklyn-eruv-supporter interpretation of the Chazon Ish, right? Nowhere is there written evidence that the Chazon Ish called downtown Manhatten a “reshus hayachid.” I’m aware of the shittah to which you refer, and it’s your right to interpret it as you’ve been taught, but it’s a little disingenuous to make it sound like there’s an explicit Chazon Ish which states as you stated.”
You should learn the inyan prior to making such arguments. Even Rav Moshe agreed that CI would allow an Manhattan/Brooklyn eruv; hence he disagreed with the CI in order to proscribe these eruvin.