I discuss the propositional knowledge of an omniscient being, knowledge of facts that can be represented by that-clauses in sentences such as ‘John knows that the world is round.’ I shall focus upon questions about a supposedly omniscient being who propositionally knows the truth about all current states of affairs. I shall argue that there is no such being.

There is a significant debate over the moral status of human embryos. This debate has important implications for practices like abortion and IVF. Some argue that embryos have the same moral status as infants, children, and adults. However, critics claim that the frequency of pregnancy loss/miscarriage/spontaneous abortion shows a moral inconsistency in this view. One line of criticism is that those who know the facts about pregnancy loss and nevertheless attempt to conceive children are willing to sacrifice embryos lost for (...) the healthy children they ultimately have. I respond to this criticism and argue that on the most plausible accounts of well-being, these embryos are not made worse off and thus not “sacrifices.” I then make some more general remarks about what people’s typical views about pregnancy loss show about their views toward the moral status of embryos. (shrink)

Approximately 50 years have passed since Judith Jarvis Thomson wrote A Defense of Abortion (1971). Her article has significantly shaped the philosophical literature on abortion. In this paper, I will summarize some of the interesting and important work done on the topic since Thomson's article. I will highlight Thomson as a defender of the claim that abortion is morally permissible and Don Marquis as an influential opponent of that claim. I will start by articulating Thomson's case, focusing on the violinist (...) analogy. I will underscore key questions, concepts, and objections the analogy raises. I will then examine briefly how philosophers have addressed some of these issues. Next, I will outline Marquis’ work, provide a similar commentary on it, and discuss some of its main responses. I will then survey other philosophers who have addressed abortion beyond the scope of providing specific replies to Thomson or Marquis. I will close by highlighting significant points of agreement and disagreement in the literature, as well as crucial gaps in the current research. The paper is not an attempt to address every work on the topic over the last five decades, nor is it aimed at taking a position on the moral permissibility of abortion. My goal is to provide an overview of the dialectic. (shrink)

Brain death has been accepted worldwide medically and legally as the biological state of death of the organism. Nevertheless, the literature has described persistent problems with this acceptance ever since brain death was described. Many of these problems are not widely known or properly understood by much of the medical community. Here we aim to clarify these issues, based on the two intractable problems in the brain death debates. First, the metaphysical problem: there is no reason that withstands critical scrutiny (...) to believe that BD is the state of biological death of the human organism. Second, the epistemic problem: there is no way currently to diagnose the state of BD, the irreversible loss of all brain functions, using clinical tests and ancillary tests, given potential confounders to testing. We discuss these problems and their main objections and conclude that these problems are intractable in that there has been no acceptable solution offered other than bare assertions of an ‘operational definition’ of death. We present possible ways to move forward that accept both the metaphysical problem - that BD is not biological death of the human organism - and the epistemic problem - that as currently diagnosed, BD is a devastating neurological state where recovery of sentience is very unlikely, but not a confirmed state of irreversible loss of all [critical] brain functions. We argue that the best solution is to abandon the dead donor rule, thus allowing vital organ donation from patients currently diagnosed as BD, assuming appropriate changes are made to the consent process and to laws about killing. (shrink)

Abortion and embryo destruction prevent a future of value, but that does not make them wrong.Abortion involves the killing of a fetus. One bad thing about killing a fetus is that the fetus is deprived of a future of value. Think of all the things which make your life good and worth living: understanding the world, seeing your children grow into independent, intelligent, and happy people, watching a sunset over the hills, enjoying good times with friends. By killing the fetus, (...) we are depriving it of a future life likely to contain these things. And more. The fetus would likely grow to be a person who would have contributed to the world in many ways—bringing joy to its parents, happiness, and friendship to many. That person would have laboured for society and perhaps even discovered a cure for cancer or developed the first bionic eye.The loss of these possible futures is bad. It makes the killing of a fetus wrong. This is Don Marquis's argument against abortion.1 It is one of the best arguments against abortion which does not rest on theological premises.Another way of putting this is to say that we have a good reason not to kill a fetus. A reason for acting is a fact or circumstance forming a sufficient justification for an action. Or in this case, not to perform an action. We have all sorts of reasons for action. Our reasons often conflict. I may have a good reason to visit my mother and a good reason to take my children to the park. What we have most reason to do is what it is right to do. It is what we should do. If we have most reason not to perform an act, …. (shrink)

In this issue of the journal Mark Brown has offered a new argument against my potential future of value theory. I argue that even though the premises of this new argument are far more defensible than the premises of his old argument, the new argument does not show that the potential future of value theory of the wrongness of killing is false. If the considerations to which Brown appeals are used, not to show that the potential future of value theory (...) is false, but to show that abortion is morally permissible, they are also unsuccessful. I also argue that Brown's clarified self-represented future of value account and Simon Parsons's account of the wrongness of killing are both subject to major difficulties. Finally, I show, in an appendix, that Brown's assertion that my discussion of his views suffers from major logical errors is false. (shrink)

In Marquis's recent paper he has not satisfactorily shown that killing does not adversely affect the victim's present self-represented desires for their future. Marquis is correct in believing life and death are distinct, but living and dying are not. In fact, to use a well-known saying, “the second we are born we start to die”. During the process of dying, whether it be long as in over our lifetime or short as in as we are being killed, there comes a (...) point when the present realistic desires we have we know will never be satisfied. This is why killing can be wrong. This would imply killing an unconscious person, infant, or fetus cannot be wrong. But such killing can be wrong, despite the person killed not experiencing the desire not to be killed as he was dying. Killing can be wrong because others can have a present self-represented desire for that person not to be killed to have been killed. If this line of reasoning is correct, then the “best interests” principle often applied to life and death considerations regarding unconscious persons, infants, and fetuses, is invalid, as such human beings do not have present desires. All that matters is what relevant others rationally desire, after being informed of the facts and the consequences, for that unconscious person, infant or fetus. (shrink)