Well, some will and , of course, some will not. The failure rate is higher the sooner after fertilisation we pick our start point- and most eggs never get fertilised anyway. It's a hard gauntlet to run.Without wilful intervention, a viable first-trimester human will become a viable second-trimester human being.
Assuming, of course, that human embryos are human beings. That's where the real crux of the matter is. All these shenanigans with reductio and this or that contingency are beside the point. Saying that human embryos can't be human beings because if they were it would raise all sorts of other difficult questions, or result in all sorts of other ethical dilemmas, is putting the cart before the horse. It's also a pretty heinous abdication of one's ethical responsibility. You end up in the position that you arbitrarily dehumanize human embryos because adjudicating between mothers and their children is hard.
As you say, here's the crux. While I acknowledge the soundness of your case,
we differ fundamentally at this point. I fully accept that a fertilised human ovum is exactly that- a fertile egg. This does not qualify it as "human", any more than a human cancer is "human" in anything other than location. AS my granny used to say- "You can get one of those when you can't afford a new hat."
It has the advantage of simplicity. So has legalising abortion at any time up tillSo it all comes down to whether or not it's human. I think ulitmately it's a metaphysical question that does not lend itself to conclusive logical analysis. I also find that for me personally, considering the thing to be human from conception onward, while it does raise a number of ethical dilemmas, is morally more tenable overall than selecting any arbitrary cut-off point after conception.
unassisted birth- or five minutes afterwards. Or five years afterwards.
Any point on the line is arbitrary, but some seem less arbitrary than others .
Just so. As global population climbs, eventually later stage abortion, infanticide and legal enforcement of birth control may become acceptable.And, for the third time: Law, custom, and common sense recognize many different kinds of killing, under many different kinds of circumstances, that sensibly require many different kinds of responses from us as individuals, as communities, and as a legal system.