True, same is true for Quebec if you check the 1905 map, however what they would get upon separation would be somewhat similar to the yellow portion here, though I think some of the northern part of that yellow portion they lose as well.
It’s not the same as Québec because they joined in 1867.
The big point is that the “borders at the time of joining confederation” would give them the whole slice. Thiugh I agree it is unlikely they get the whole slice, and the entire thing would be a protracted international legal battle with border disputes for decades.
True, same is true for Quebec if you check the 1905 map, however what they would get upon separation would be somewhat similar to the yellow portion here, though I think some of the northern part of that yellow portion they lose as well.
https://en.wikipedia.org/wiki/Partition_of_Quebec
My point being, there’s a strong likelyhood they would not walk away with the whole province.
It’s not the same as Québec because they joined in 1867.
The big point is that the “borders at the time of joining confederation” would give them the whole slice. Thiugh I agree it is unlikely they get the whole slice, and the entire thing would be a protracted international legal battle with border disputes for decades.