

Accurate, but of course the real thing to note is in evolution, our lines and definitions of what a chicken is… is especially undefined. we just draw the line and call a particular creature a chicken… which is significantly more similar to the proto-chicken than a modern chicken is.
ah yeah quite true, if the question is egg’s in general, then yeah, eggs existed before the first land walking creatures. I always assumed the question is meaning a chicken egg specifically. Of which the answer is still the same as, as assuming we as humans pick an arbitrary line to draw for being a chicken. Obviously before the first chicken exists, a creature just short of meeting the qualifications for a chicken, would have layed an egg of what we define as a chicken, to create the first “chicken”.