It's loosely goosey, but
still sounds like a chicken Tanjiro has no chance of choking
His state of existence is pretty confusing - and it's gonna make any discussion about 'killing' him/causing him to cease to be rather a mind-fuck
As I said before, I'm
still not quite sure how he 'existed' when he 'didn't' (as in, when his Schrödinger powers couldn't recognise themselves and so made the being known as Alucard cease to be) - to be able to kill all the souls inside himself, to find himself, when he was 'nothing'...
All I know is that he did - and that it'll make his next fight(s?) rather interesting
... and, in all likelihood, interestingly subjective
Honestly, I reckon that '
he just is' is probably the best answer you will get to questions like this