Knowledge, Belief, and Assertion

The traditional answer to the question what it is to make an\ud assertion appeals to belief (see Grice 1989 and Searle\ud 1969). To assert something, so the analysis goes, is to\ud express a belief by way of uttering a sentence. Timothy\ud Williamson claims (1) that on the traditional analysis\ud assertion is constitutively governed by the truth rule (242):1\ud One must: assert p only if p is true.\ud He argues (2) that the traditional analysis is mistaken, and\ud (3) that assertion is constitutively governed by the\ud knowledge rule instead (243):\ud One must: assert p only if one knows p.\ud I will argue that all three of these claims are false

When to Start Saving the Planet?

People should take immediate action to prevent climate harms. Although intuitive, this claim faces two important problems. First, no individual can avert a climate harm on their own. Second, too few people are typically willing to contribute. In response, I point out that individuals can sometimes help prevent harm to the climate, and I argue that they should take preventive action when the prospect of success is good enough. Furthermore, when too few are willing to contribute, an individual may be required to activate others to increase their number. This serves to increase the prospect of success. Crucially, this prospect may be good enough well before enough people have become willing to engage. It follows that people should start saving the planet soon, if not immediately

Can There Be Institutions Without Constitutive Rules?

Institutions depend on rules. But on what kind of rules? It has been argued that they depend on constitutive rules, this in contrast to ordinary social practices, which depend on regulative rules instead. The underlying idea is that constitutive rules differ categorically from regulative rules. Against this, I argue that regulative rules can be transformed into constitutive rules by doing little more than introducing a status term. The presence or absence of a status term does not make a difference to whether a social practice qualifies as an institution. In light of this, I propose that, pace Searle, there can be institutions without constitutive rules. Furthermore, even if it sounds somewhat paradoxical, regulative rules can constitute institutions. This implies that the distinction between social practices and institutions cannot be drawn in terms of these two kinds of rules. Following Tuomela, I propose to draw this distinction in terms of social norms instead: in contrast to ordinary social practices, institutions are governed by social norms. Hence, what is distinctive of institutions is that they feature deontic powers

False models as explanatory engines

Many models in economics are very unrealistic. At the same time, economists put a lot of effort into making their models more realistic. I argue that in many cases, including the Modigliani-Miller irrelevance theorem investigated in this paper, the purpose of this process of concretization is explanatory. When evaluated in combination with their assumptions, a highly unrealistic model may well be true. The purpose of relaxing an unrealistic assumption, then, need not be to move from a false model to a true one. Instead, it may be providing an explanation of some phenomenon by invoking the factor that figures in the assumption. This idea is developed in terms of the contrastive account of explanation. It is argued that economists use highly unrealistic assumptions to determine a contrast that is worth explaining. The process of concretization also motivates new explanatory questions. A high degree of explanatory power, then, may well be due to a high number of unrealistic assumptions. Thus, highly unrealistic models can be powerful explanatory engines

When to Start Saving the Planet?

People should take immediate action to prevent climate harms. Although intuitive, this claim faces two important problems. First, no individual can avert a climate harm on their own. Second, too few people are typically willing to contribute. In response, I point out that individuals can sometimes help prevent harm to the climate, and I argue that they should take preventive action when the prospect of success is good enough. Furthermore, when too few are willing to contribute, an individual may be required to activate others to increase their number. This serves to increase the prospect of success. Crucially, this prospect may be good enough well before enough people have become willing to engage. It follows that people should start saving the planet soon, if not immediately

When to Start Saving the Planet?

People should take immediate action to prevent climate harms. Although intuitive, this claim faces two important problems. First, no individual can avert a climate harm on their own. Second, too few people are typically willing to contribute. In response, I point out that individuals can sometimes help prevent harm to the climate, and I argue that they should take preventive action when the prospect of success is good enough. Furthermore, when too few are willing to contribute, an individual may be required to activate others to increase their number. This serves to increase the prospect of success. Crucially, this prospect may be good enough well before enough people have become willing to engage. It follows that people should start saving the planet soon, if not immediately