1 introducing a subordinate clause expressing a reason or cause:
he seemed pleased that I wanted to continue
From Oxford online dictionary
Nevertheless, I could not relate this to the original sentence; because I thought that the fact someone has a set of caracteristics cannot be cause nor reason of the person's Un-identity(who are you.)
But the fact can be a reason of the asking. Act, not content. Even though the two are almost indistinguishable in the asking.
Now I feel I can willingly brush off the absence of comma as some trifle historical event.
Thank you so much, MrPedantic.