> What are the base cases? A base case is an ancestor whose Britishness does not depend on a parent, e.g. someone who was naturalised, or born in the UK before 1983 (which makes one unconditionally british regardless of parents). That's right, further into the future we get from 1983, the taller these call-stacks can get.
This is insane to me, coming from a country that simply has a central database of all citizens and foreign residents, and a citizenship check is probably something like a single SELECT on an SQL table.
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