Ah, the chicken and egg question changes a lot depending on wether you are talking about an egg or a chicken egg xD In the first scenario, the egg is clearly first, by a long shot, but on the second one both the chicken and the chicken egg are artificial, abstract constructs that we use to identify a specific type of bird and no othe, which "don´t appear" at the same time...but none of it is actually real and there was never a first chicken or a first chicken egg.
Also we are all made of marshmellow and the true taste of the universe is cheesecake xDD
I know it all sounds pretentiously philosophical and counterintuitive but consider the electromagnetic spectrum example. We all know there is no real point in which one colour changes into another, and yet we recognize differences between them (clearly yellow is not the same as green even though we would never agree where exactly yellow starts being green) and label them in order to be able to talk about them. It´s exactly the same thing. There is no point at which the first chicken appeared, but since there are differences between a chicken and everything else, it´s very useful to give it a label and be able to identify it from all the other stuff.
I´m glad you enjoy my ramblings xD For what is worth i am a terrible student and i think i´m trying to compensate by pretending to be a teacher..