No, not at all. I was engaging gridlock on the implication that all stages of human development must be assigned equivalence, which I thought was his contention when he stated in an earlier post that a blastocyst "is a certain stage in human development, kind of like a four-and-a-half year-old.
25 years old is also an incidental property of of the essence, "human being", but that's pretty much where the similarity ends. In other words, it is not essential that a human being be 25 years old to be human. There are human beings that are other ages. Some human beings are 14 days old, for example. Hence, the property of being 25 years old is an incidental feature of humans. That having been said, a gamete and 25 year old are two very different kinds of incidental categories of human.
Cordially,