This seems disingenuous to me. Already by calling what's essentially rhetoric "arguments", he's building a huge strawman. Take abortion - according to opponents a fetus is a living human being, and actively and purposefully killing a living human being is murder in the Charles Manson style. The argument for abortion isn't that it's somehow OK to kill really young human, it's that fetuses aren't independent human bein…
> The argument for abortion isn't that it's somehow OK to kill really young human Not true! At least, if you asked me to make an argument in favor of abortion, that's the argument that I would make. No human within the first year or so after conception has any of the distinguishing features which give intelligent beings a higher moral status: Tool use, language use, abstract thought, logical reasoning, permanent memo…
That's a very arbitrary time at which to draw a line, and it's not even applied consistently. Everyone would consider the deliberate killing of a 22-week foetus being kept alive on an incubator to be murder, so clearly t_D must be <= 22 weeks after conception. A 26-week foetus is much closer to t_I, but there are those who consider it acceptable to kill such a thing, solely because it happens to be inside someone's body. That's the part I can't understand.