Pak-Hang Wong

While geoengineering may counteract negative effects of anthropogenic climate change, it is clear that most geoengineering options could also have some harmful effects. Moreover, it is predicted that the benefits and harms of geoengineering will be distributed unevenly in different parts of the world and to future generations, which raises serious questions of justice. It has been suggested that a compensation scheme to redress geoengineering harms is needed for geoengineering to be ethically and politically acceptable. Discussions of compensation for geoengineering harms, however, sometimes presume geoengineering has presented new and unique challenges to compensation that cannot be readily accommodated by existing compensation practices. The most explicit formulation of this view was recently presented by Toby Svoboda and Peter J. Irvine, who argued that two forms of uncertainty in geoengineering — namely, ethical uncertainty and scientific uncertainty — make it immensely difficult to devise an ethically and politically satisfactory compensation scheme for geoengineering harms. In this paper, we argue against the view that geoengineering presents new and unique challenges relating to compensation. More specifically, we show that placing these challenges within the broader context of anthropogenic climate change reveals them to be less serious and less specific to geoengineering than some appear to believe.

The topic of this thesis is about one of the simplest linguistic expressions in our natural languages, names. The debate about the meaning of names has a longstanding history in philosophy of language. One camp, as known as Millianism, maintains that a name only contributes its referent to the meaning of sentence which contains it, and the other camp, as known as Descriptivism, maintains that a name is disguised definite description. My thesis aims to contribute to this continuing debate. Millianism, which holds that a name n only contributes its referent to the meaning of the sentence which contains it, seems to have problem in explaining the cognitive role of names. For, it seems intuitive true that a rational person will take ‘Superman is Superman’ and ‘Clark Kent is Superman’ to have different meaning, even though the names have the same referent. Also, if we substitute co-referring names in belief ascriptions, e.g. ‘Lois believes that Superman flies’ and ‘Lois believes that Clark Kent flies’, their truth-values appear to change. The intuitions as such come into conflict with Millianism, and appear to show that the view is false. In this thesis, I will examine two Millian responses to the above problems. I shall criticize a response famously defended by Salmon and (early-)Soames, and to defend a version of Millianism proposed by Soames, which, while holding that a name only contributes its referent to the meaning of a sentence which contains it, allows a speaker to assertively utter these sentences and belief ascriptions to assert something beyond the meaning of them. So, the meaning of the two sentences ‘Superman is Superman’ and ‘Clark Kent is Superman’ is just the same; and, the belief ascriptions ‘Lois believes that Superman flies’ and ‘Lois believes that Clark Kent flies’ do not differ in truth-value. But, a speaker can assert something in fact different in meaning or truth-value via these sentences and ascriptions. In the thesis, I shall show that this version of Millianism is preferable to the one defended by Salmon and (early-)Soames.