On the Costs of Nonclassical Logic

Solutions to semantic paradoxes often involve restrictions of classical logic for semantic vocabulary. In the paper we investigate the costs of these restrictions in a model case. In particular, we fix two systems of truth capturing the same conception of truth: (a variant) of the system KF of Feferman (The Journal of Symbolic Logic, 56, 1–49, 1991) formulated in classical logic, and (a variant of) the system PKF of Halbach and Horsten (The Journal of Symbolic Logic, 71, 677–712, 2006), formulated in basic De Morgan logic. The classical system is known to be much stronger than the nonclassical one. We assess the reasons for this asymmetry by showing that the truth theoretic principles of PKF cannot be blamed: PKF with induction restricted to non-semantic vocabulary coincides in fact with what the restricted version of KF proves true.     

“sexuality and death” in freud's discovery of sexual aetiology

Abstract

The present study focuses on Freud's discovery of sexual aetiology in the period from his studies in Paris and Berlin (1885–86) to self-analysis (1897). The study gives a reassessment of both the link and the break between Freud's early works and the contemporary medical views and splits concerning sexual aetiology, which is relevant for the understanding of Freud's later developments. Freud's initial aversion toward sexual aetiology is investigated, and a significant connection between sexuality and death is found in the medical practice of female circumcision and castration in the treatment of hysteria. Finally, the relevance of the tabooed surgical operations is discussed in relation to a series of important moments for the birth of psychoanalysis (the collaboration with Fliess and the operation on Emma Eckstein, the Irma dream, the seduction theory and its abandonment, and the emergence in Freud of the memory of the death of little Julius as the “germ of guilt”).     

Role of stimulus and response feature overlap in between-task logical recoding

Psychological Research - The reversal logical recoding rule (i.e., “respond opposite”) induced by an incompatible task (e.g., a task requiring to respond to red or green stimuli by...     

Knowledge,Truth and Plausibility

From antiquity several philosophers have claimed that the goal of natural science is truth. In particular, this is a basic tenet of contemporary scientific realism. However, all concepts of truth that have been put forward are inadequate to modern science because they do not provide a criterion of truth. This means that we will generally be unable to recognize a scientific truth when we reach it. As an alternative, this paper argues that the goal of natural science is plausibility and considers some characters of plausibility.     

Trauma and the symbolic function of the mind

The relationship between trauma and the symbolic function of the mind is discussed in three parts. First, a short outline is given of the long‐lasting split within the field of trauma: it consists in a dichotomy between the symbolic and anti‐symbolic reading of the traumatic experience – as I have called it in a previous paper. In the second part, it is maintained that the work of Ferenczi represents an attempt at overcoming this split. In the third and last part, the notion of symbolic adaptation is introduced. The process of adaptation has to ensure the survival of the individual along lines capable to foster the hope that the lost equilibrium between the individual and his environment will one day be restored. This function is performed by symbols: by linking together the lost satisfaction and the hoped‐for wish‐fulfillment, by creating bridges between past and future, symbols enable us to adjust to the new environment without renouncing hope. Symbols are mediators between the pleasure principle and the reality principle. When a person is struck by trauma it is precisely this unifying function which is broken. A typical consequence of this situation is described by Ferenczi as a rupture between feeling and intelligence.     

Decay of Stimulus Spatial Code in Horizontal and Vertical Simon Tasks

Evidence on the processes underlying the horizontal and vertical Simon effect is still controversial. The present study uses experimental manipulations to selectively delay the stages of response execution, response selection, and stimulus identification in three experiments. A reduction is observed for both horizontal and vertical Simon effects when response execution is delayed by a go-signal presented 400–600 ms post-stimulus onset or when a spatial precue is presented 200–400 ms before the stimulus. When the overlap between stimulus spatial code formation and response selection is prevented by decreasing stimulus discriminability, the horizontal Simon effect decays, but the vertical Simon effect does not change. Activation theories, which propose a decay of the automatically activated response ipsilateral to the stimulus, mainly apply to the horizontal Simon effect. In contrast, translation theories, which propose that the effect occurs when stimulus features are translated into a response code, are more suitable to account for the vertical Simon effect.