Anyone who has actually done their research on pregnancy would know the following:
A person definitely is 100% a person when they're born. That's not debatable.
No mammal without a brain has been capable of thought. That's not debatable.
At 13 weeks, the brain actually does develop in the foetus and is capable of some activity. Before that point it's not a brain, but merely a neural plate (essentially the blueprint for the brain, not an actual brain itself). Fact.
At 20 weeks, the baby can actually be born and survive outside the womb, which means it's the earliest point of personhood by autonomy and not just thought alone. Fact.
So the