There is no absurdity, because you still are something, you are a human. you have a passport, you have a nationality, you have a familytree, you have a profession, you have a social class, and so on...
For the purposes of meditating on selflessness you first of all have to understand what the self is, how it exists, in the skandhas.
Many buddhists who nominally claim selflessness will react angrily if they are called "negro", "gypsy", "russian", "swede", and so on...( providing that you don't have one of these identities, or selves, ofcourse!).
Yes, you are provisionally the name on your passport. Your are, provisionally and conventionally, that shape you call your body. But so what?
let's say you're a particular human being. Any particular human being is reducible to the five skandhas, which is to say, isn't really a coherent identity at all in an ultimate sense, it's a coincidence of five categories of impermanence.
my point: it would help to understand the Two Truths if you want to understand a Mahayana position on this topic
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