The full-text of this book chapter is not available in ORA. Citation: Williamson, T.. Knowledge of counterfactuals. In: O'Hear, A. Epistemology. Cambridge: Cambridge University Press, pp. 45-64.

How the rational imagination develops remains an open question. The ability to imagine emerges early in childhood, well before the ability to reason counterfactually, and this suggests that imaginative thought may facilitate later counterfactual ability. In addition, developmental data indicate that inhibitory control may also play a role in the ability to reason counterfactually.

Resumen El uso del término imaginación remite a un cierto tipo de actividad mental que en su formulación más básica refiere a la capacidad humana para crear imágenes en ausencia de lo representado, es decir, para representarnos objetos o estados de cosas que están ausentes, y a la capacidad para crear imágenes a partir de otras que ya se poseen. Esta formulación permite dar cuenta de una amplia gama de experiencias humanas que van desde la creación artística y la innovación (...) técnica hasta la anticipación de posibles escenarios en los que intervenir. En particular voy a centrarme en un uso específico de la imaginación que denominaré imaginación práctica y que consiste principalmente en la anticipación contrafáctica de posibles estados de cosas resultantes de nuestras acciones. A partir de esto sostendré la existencia de una relación interna entre imaginación práctica y racionalidad práctica, en virtud de la cual la primera oficia de posibilitadora de la segunda. Para ello relevaré cuatro formas de ejercicio de la racionalidad práctica que han sido tematizadas a lo largo de la historia de la filosofía: la ética, la moral, la política y la legal.The use of the term imagination refers to a certain type of mental activity that in its most basic formulation refers to the human capacity to create images in the absence of what is represented, that is, to represent objects or states of things that are absent, and the ability to create images from others that are already possessed by the agent. This formulation allows to account for a wide range of human experiences ranging from artistic creation and technical innovation to the anticipation of possible scenarios in which to intervene. In particular, I will focus on a specific use of the imagination that I will call practical imagination and that consists mainly in the counterfactual anticipation of possible states of affairs resulting from our actions. From this perspective I will sustain the existence of an internal relation between practical imagination and practical rationality, by virtue of which the first enables the second. To do this, I will highlight four types of practical rationality that have been thematized throughout the history of philosophy: ethical, moral, political and legal rationality. (shrink)

Causal and counterfactual thoughts are bound together in Byrne's theory of human imagination. We think there are two issues in her theory that deserve clarification. First, Byrne describes which counterfactual possibilities we think of, but she leaves unexplained the mechanisms by which we generate these possibilities. Second, her exploration of and enablers gives two different predictions of which counterfactuals we think of in causal scenarios. On one account, we think of the counterfactuals which we have control over. On the other, (...) which counterfactuals we think of depends on whether something is a strong cause or an enabler. Although these two accounts sometimes give the same predictions, we present cases in which they differ, and we would like to see Byrne's theory provide a way of reconciling these differences. (shrink)

The main purpose of this article is, from a semiotic perspective, arguing for the recognizing of a semantic role of the imagination as a necessary condition to our linguistic experience, regarded as an essential feature of the relations of our thought with the world through signification processes ; processes centered in but not reducible to discourse. The text is divided into three parts. The first part presents the traditional position in philosophy and cognitive sciences that had barred until recent times (...) the possibility to investigate the semantic function performed by imagination, mainly due to the anti-psychologist arguments on which it is based. After that, I situate my perspective inside of the recent research panorama in philosophy and cognitive science. The second part presents the semiotic framework on the relation between thought, language, and world, conceived through the concepts of signification processes and sense-conditions. Within this framework, I introduce the concept of linguistic experience, characterizing semantic imagination as one of its sense-conditions. In the third part, several pieces of evidence for corroborating the semantic function of imagination are discussed. These pieces come from the fields of phenomena denoted as diagrammatic thought and counterfactual thought. Diagrammatic thought, briefly discussed, points out the semantic work of imagination in the semi-discursive sign systems constructed in mathematics, logic, and natural science. After defending a widening of the concept of counterfactual thought, and its intrinsic relation with semantic imagination, the role of semantic imagination is briefly discussed in some types of counterfactual thought found in our conceptions of modal concepts, in thought experiments, in apagogical arguments, and in the creative discursive devices. (shrink)

The notion of mutation is applicable to the generation of novel designs and solutions in engineering and science. This suggests that engineers and scientists have to work against the biases identified in counterfactual thinking. Therefore, imagination appears a lot less rational than claimed in the target article.

In this response I discuss some of the key issues raised by the commentators on The Rational Imagination. I consider whether the imaginative creation of alternatives to reality is rational or irrational, and what happens in childhood cognition to enable a rational imagination to develop. I outline how thoughts about causality, counterfactuality, and controllability are intertwined and why some sorts of possibilities are more readily imagined than others. I conclude with a consideration of what the counterfactual imagination is for.

Byrne (2005) assumes that counterfactual thinking requires a comparison of facts with an imagined alternative. In our view, however, this assumption is unnecessarily restrictive. We argue that individuals do not necessarily engage in counterfactual simulations exclusively to evaluate factual reality. Instead, comparative evaluation is often suspended in favor of experiencing the counterfactual simulation as if it were real.

Imagination and rational thought may be guided by identical principles, and Byrne's (2005) analysis expertly synthesizes a diverse literature on counterfactual thinking. Further attention should be paid to metacognitive experiences, like ease or difficulty of thought generation, which accompany the imaginative process. Only by considering metacognitive experiences along with the content of what people imagine can we fully understand imagination.

Byrne's book is intended to explain why people imagine the things they do when they create alternatives to reality. Two fruitful areas of further research are: (1) How can her approach explain dreams and daydreams? (2) What is the developmental time course of the child's understanding of reality and imagination?

Byrne has written a terrific book that is, nevertheless, based on a mistaken assumption – that imagination is largely rational. I argue in this commentary that her book follows very well, if one accepts her assumption of rationality, but that the bulk of the evidence available to us contradicts this assumption.