There is an issue worth flagging up here which has to do with your belief it is the attributes of personhood that give human life value and secure the right to life. As we noted above, a fetus is not a person. More than this, though, it is never a person. You stated that in the late stages of pregnancy, abortion is only justified in limited circumstances. However, given that a fetus is never a person, it isn't clear why you would think this - in other words, why you would think abortion is only normally, rather than always, morally justified.

There is also a rather subtle inconsistency in your responses worth mentioning. You responded to the second people-seeds scenario that you ought to allow the person-plant to use your house for a week, even if it doesn't have the right to. However, this doesn't make much sense in terms of your belief that the attributes of personhood have to be in place before human life has intrinsic value. To put it simply, the person-plant, despite its name, is not a person in the required way, so there is no moral imperative to preserve its life: by your own lights, you do it no morally relevant harm by destroying it. You might be tempted to think it is worth keeping alive for the seven days it takes until it is 'born'. However, there are two problems here: the first is that a new born baby - whether it emerges from a womb or is grown from a plant - doesn't possess the requisite attributes of personhood until a good while after its birth; the second problem is that even if it did, you can't invoke them as a justification for keeping the person-plant alive without committing yourself to the proposition that it is potential that's important in giving life value and securing the right to life.

The other point to make here concerns your attitude towards spontaneous abortion (miscarriage). It is estimated there are around 1,000,000 miscarriages every year in the United States. Nevertheless, you ranked the issue below cancer and heart disease in terms of its seriousness, and indeed not even in the top three medical problems, which suggests that you do not consider it to be a particularly serious issue. This response actually makes sense (if, as per your instructions, you didn't take into account the upset caused to those people who suffer miscarriages when determining how to rank the various issues). No miscarriages occur when the fetus is a person, since the fetus is never a person. Therefore, in your terms, there is no tragedy in the loss of its life beyond the unhappiness caused to those who care about it (which of course is morally significant, but not relevant from the point of view of this activity).