John William
Well-known Exeweb poster
It's technically correct, however.But it does also show that reliance on social media as the answer to everything might be a tad optimistic!
Plymouth and Torbay have not been legally part of Devon since 1998, when they became Unitary Authorities.
They are however still part of Devon for ceremonial purposes.
The previous big changes in the county boundaries were in 1844 when the detached bits of Cornwall and Dorset in Devon and vice versa were exchanged by an Act of Parliament; there were also some more minor exchanges of territory later.
Interestingly, Exeter was also somewhat of an anomaly until recently: formally it was “the County of the City of Exeter”, with its own Sheriff and Quarter Sessions, and some other independent features, but otherwise part of the County of Devon, until 1974 when its semi-detached legal status was abolished.
(apologies for the nerdy nature of this but I'm writing a book on the history of Devon so have to know about these things).