Talk:Emer Costello

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Local councillors in Dublin city
Why was this category removed? Laurel Lodged (talk) 20:09, 14 December 2022 (UTC)
 * She is already in the sub-category Lord Mayors of Dublin. Spleodrach (talk) 22:08, 14 December 2022 (UTC)
 * OK. That's logical at one level. Not logical at another level. Why would Category:Lord Mayors of Dublin be a child of Category:Local councillors in Dublin (city)? Lord Mayors existed long before local councillors existed. Laurel Lodged (talk) 12:13, 15 December 2022 (UTC)
 * No, that's not correct, the council has always had a Lord Mayor (or previously Mayor). Before the council it was Dublin Corporation which was originally established in the 12th century. The first mayor was in 1229, the first lord mayor in 1665. Spleodrach (talk) 18:00, 15 December 2022 (UTC)

Every Lord Mayor in the modern state has been a Councillor. But not every Lord Mayor has been in the modern state. Since the Lord Mayor Category is not a perfect subset of the Category Councillor, then it cannot be a child of the Category Councillor. Each person must be individually and independently categorised to one or both categories. Laurel Lodged (talk) 08:37, 16 December 2022 (UTC)
 * I think you are incorrect. Before 1840, Dublin Corporation was a two-chamber body, and the upper body, the Board of Aldermen elected the Lord Mayor from their members. So the Lord Mayor (or Mayor) has always been a member of Dublin City Council or Dublin Corporation. Spleodrach (talk) 09:00, 16 December 2022 (UTC)
 * But an Alderman is not a Councillor. Laurel Lodged (talk) 11:33, 16 December 2022 (UTC)
 * Aldermen were member of Dublin Corporation, and the category description says - "People who were elected as Councillors to Dublin City Council or the entity that preceded it - Dublin Corporation". Spleodrach (talk) 15:32, 17 December 2022 (UTC)