RESUMO De acordo com a teoria das funções de verdade, a verdade/falsidade de uma proposição é computável a partir da verdade/falsidade das suas proposições “internas”: para cada proposição há uma função entre valores de verdade. Aplicada a proposições modais, origina a semântica dos mundos possíveis e, aplicada a proposições normativas, origina uma semântica que reduz os conceitos normativos aos conceitos modais, a semântica modal. Esta redução fica posta em questão com a existência dos chamados ‘paradoxos da lógica deôntica’. Estes não (...) podem ser vistos como meras anomalias, mas devem ser vistos como indícios da incorreção da semântica modal. Em todos eles, a regra da necessitação, assim como o axioma da distribuição, “não batem certo”. Não obstante, o cumprimento/incumprimento das normas já é computável a partir da verdade/falsidade das proposições que expressam os estados de coisas devidos. ABSTRACT According to the theory of truth-functions the truth/falsehood of a proposition is computable from the truth/falsehood of its “internal” propositions: for each proposition there is a function between truth values. Possible world semantics arises from the application of that theory to modal propositions; modal semantics - the reduction of normative concepts to modal concepts - arises from its application to normative propositions. But the ‘paradoxes of deontic logic’, as they are called, undermine such reduction: they cannot be seen as mere anomalies but instead as evidence for the wrongness of modal semantics. In all these paradoxes, the necessitation rule, as well as the distribution axiom, fail. Nevertheless, the fulfillment/nonfulfillment of norms is computable from the truth/falsehood of the propositions which express the required states of affairs. (shrink)

Recently, a number of philosophers and psychologists have drawn on neuroscientific and psychological research on the role of affective processes in moral thinking to provide support for moral sentimentalism. Philip Gerrans and Jeanette Kennett criticize such ‘neurosentimentalist’ accounts on the grounds that they focus only on synchronic processes occurring at the time of moral judgement. As a result, these accounts face a dilemma: either they fail to accommodate the connection between moral judgement and agency or they are committed to implausible (...) claims about the moral agency of individuals with damage to the ventromedial prefrontal cortex. I respond to this criticism, arguing that Gerrans and Kennett fail to appreciate the diachronic aspects of affective mechanisms and that they misinterpret the empirical literature on the vmPFC. I argue that neurosentimentalism does have the resources to explain the connection between moral judgement and agency. (shrink)