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Re: Ji and Ji's Classification

Hi dear DML members.
For a certain time, I'm following all this threads about Aves and Avialae and birds and I think I'm starting to get lost somewhere. Why all those new clades, as if there wasn't enough already, some of them being discussed or redefined or revised or contested?  Is that another counter-example? ( maybe it's just getting late here, it's 10 PM )
Sorry if it's a silly question.