Mackay Medical College
  •  16
    If to be is to be the value of a bound variable, then the acknowledgment and denial of the existence of chairs amounts to a serious disagreement about the range of a quantifier. However, by resorting to the intrinsic hierarchical structure of hi-world semantics, we find that the varying of domains from worlds to worlds can actually be accommodated within a unified framework. With the introduction of a universal domain D of hi-individuals and an existence predicate E that serves as a realization …Read more
  •  23
    Killing, a Conceptual Analysis
    Ethical Perspectives 24 (3): 467-499. 2017.
    It is commonly held that killing is morally wrong and that the killers need to be punished, and in marginal cases where killing seems justifiable, we are advised to resort to the ethics of killing for general guidance. It is also commonly held that the notion of killing per se is accountable in terms of ‘causing death’, which is a metaphysical (or even physical) issue, having nothing to do with ethics. However, this dichotomy – between the ethics of killing and the metaphysic of killing – is que…Read more
  •  50
    A Leibnizian semantics proposed by Becker in 1952 for the modal operators has recently been reviewed in Copeland’s paper The Genesis of Possible World Semantics (Copeland in J Philos Logic 31:99–137, 2002 ), with a remark that “neither the binary relation nor the idea of proving completeness was present in Becker’s work”. In light of Frege’s celebrated Sense-Determines-Reference principle, we find, however, that it is Becker’s semantics, rather than Kripke’s semantics, that has captured the true…Read more
  •  60
    A Token-based Semantic Analysis of McTaggart's Paradox
    Linguistic and Philosophical Investigations 10 107-124. 2011.
    In his famous argument for the unreality of time, McTaggart claims that i) being past, being present, and being future are incompatible properties of an event, yet ii) every event admits all these three properties. In this paper, I examine two key concepts involved in the formulation of i) and ii), namely that of “validity” and that of “contradiction”, and for each concept I distinguish a static version and a dynamic version of it. I then arrive at three different ways of formulating McTaggart’s…Read more
  •  370
    The Ethics of Killing, an Amoral Enquiry
    Applied Ethics Review 59 25-49. 2015.
    In ‘What Makes Killing Wrong?’ Sinnott-Armstrong and Miller make the bold claim that killing in itself is not wrong, what is wrong is totally-disabling. In ‘After-Birth Abortion: Why Should the Baby Live?’ Giubilini and Minerva argue for allowing infanticide. Both papers challenge the stigma commonly associated with killing, and emphasize that killing is not wrong at some margins of life. In this paper, we first generalize the above claims to the thesis that there is nothing morally wrong with k…Read more
  •  22
    The Prisoner’s Dilemma: From a Logical Point of View
    Axiomathes 27 (4): 417-436. 2017.
    It is generally believed that, for a one-off Prisoner’s Dilemma game, it is logical to defect. However, both players cooperating is apparently a better choice than both defecting, hence the dilemma. In this paper, by resorting to Ramsey’s Test, Kripke’s possible world semantics, and Stalnaker/Lewis-style account of conditionals, I show that the first horn of the Prisoner’s Dilemma is an unsound argument. It originates from failing to differentiate between a possible world and a possible set of p…Read more
  •  79
    A Unified Tenseless Theory of Time
    Prolegomena 10 (1): 5-37. 2011.
    Concerning the versions of the Tenseless Theory of Time, the Old Btheory has two: the Date-analysis version and the Token-reflexive version, while the New B-theory has three: the Date-analysis, the Token-reflexive and the Sentence-type versions. Each of these five versions of the B-theory has received serious attacks from the A-theorists, some of whom even claim that the tenseless theory “though still widely held, is a theory in retreat” (Craig 1996), and that “if Quentin Smith (1993) delivered …Read more
  •  140
    The Unbearable Lightness of Personal Identity — Messages from Bioethics
    In Center for Applied Ethics and Philosophy (ed.), Applied Ethics: Risk, Justice and Liberty: 39-51, Hokkaido University. 2013.
    With the advancement of bio-science and bio-technology come nasty new bioethical dilemmas, and some bioethicists have resorted to metaphysics, in particular, the notion of personal identity, to resolve them. I claim, however, that metaphysical accounts of personal identity at present are incapable of withstanding the impact of bioethical dilemmas. Bioethical issues such as criteria of death, brain transplantation, and dementia with/without advance directives invite us to deconstruct three shak…Read more
  •  30
    Becker, Ramsey, and Hi-world Semantics. Toward a Unified Account of Conditionals
    Croatian Journal of Philosophy 16 (1): 69-89. 2016.
    In Lowe (1995), instead of endorsing a Stalnaker/Lewis-style account of counterfactuals, E. J. Lowe claims that a variation of C. I. Lewis’s strict implication alone captures the essence of everyday conditionals and avoids the paradoxes of strict implication. However, Lowe’s approach fails to account for the validity of simple and straightforward arguments such as ‘if 2=3 then 2+1=3+1’, and Heylen & Horsten (2006) even claims that no variation of strict implication can successfully describe the …Read more
  •  552
    Senses of Compositionality and Compositionality of Senses
    Linguistic and Philosophical Investigations 8 86-104. 2009.
    In The Logical Basis of Metaphysics, Dummett argues at length that Geach has been wrong in taking the sense of a predicate to be a function that sends the sense of a proper name to that of a sentence, and claims that it should instead be a means to determine the referent of the predicate, as is suggested by Frege’s sense-determines-reference (SDR) principle. This disagreement between Dummett and Geach calls for a serious investigation into two of Frege’s sense-related principles, namely the Comp…Read more
  •  20
    On killing as causing death
    Prolegomena 15 (2): 163-175. 2016.
    Common sense has that killing someone amounts to causing the death of someone. This makes killing a physical, biological, or, at best, metaphysical issue, and, as a consequence, the ethics of killing can be dealt with independently of the non-ethical issue of who the killer is. However, in this paper, we show that this is not the case. A physical/biological definition of death plus a metaphysical definition of causation does not exhaust the meaning of killing. Rather, the notion of killing per s…Read more