Michael wrote:
I don't think this is a counter-example. When you "deem" your nickname to be PineappleLover, you do so by posting some announcement to this effect to the appropriate mailing list and the Herald pays the appropriate amount of attention, all as required by the rules.
More to the point, "deeming" indicates the use of a legal fiction. A player choosing eir nickname is not fiction. From the judgement of CFJ 1361: It is my view that, for the purposes of R559, a nickname is a name that a Player chooses for emself, that can be reliably used to pick em out in the full range of Agoran contexts.