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If at 12 noon someone says that it’s the middle of the night would you vehemently disagree but respect their opinion? Obviously not, you would say that they are making a mistake. Someone like R’ Moshe Feinstein or R’ Elyashiv who has learned masechta eiruvin a couple of hundred times sees the fact that these rabbonim are wrong as clearly as you see that it’s day at 12 noon.
Again, every qualified rov has the right to pasken, I’m just trying to help you out here.