Human embryos are special human tissue that may become human, not human. Category boundaries and specificity exist for a reason.

> Are you suggesting there are human nonpersons?

We quite often use the word "human" as an indicator of future or past potential or characteristic without meaning that the thing itself is a human. My dad's ashes are "human remains", but they're definitely not a person.

You are missing the key point. A fetus is part of human development just like toddlers and adults. Ashes are not.

Just like how a sapling is a tree even if it is still in a container. You don't have to wait for the tree to be transplanted to the ground for it to be a tree.

> A fetus is part of human development just like toddlers and adults

A fetus is part of human development different from toddlers and adults which are also parts of human development different from each other. A sperm is part of human development. A protein molecule is part of human development. A second glass of wine on a rainy evening is part of human development.

A fetus has the exact same DNA as the adult it will become. That fetus' father's sperm does not.

> A second glass of wine on a rainy evening is part of human development.

You are just being obtuse. We aren't talking about that sort of development and you know it. We are talking about a toddler becoming an adolescent and a teenager becoming an adult.