In this article, we will concentrate on the two true norm definitions that have existed throughout the history of the Deontic Logic: that offered by Professor Kalinowski and that proposed by the semantics of possible worlds. The former is based on Tarski’s definition of the true proposition, but it has the drawback of depending on a concrete, philosophical theory concerning the nature of norms. The latter, widely accepted nowadays, presents difficulties which we will analyse, using as a reference, K. Solt’s critique. Despite its limitations, it offers the indisputable advantage of being independant of any concrete, philosophical option, and indicates, in our opinion, the correct way of proceeding.

There is a credibility decay on positive knowledge among the social scientists and particularly among the psychologists. Certainly different prejudices dwell upon this phenomenon. First and principal the usually made identity of positive and natural knowledge. This belief is also fed by many others such as that one which assumes that every quantification, which is a consequence of positive knowledge,follows the model of the Physical Sciences. We consider that all these prejudices do not keep in mind the work done in the last decades on the Theories of Measure. We consider also that psychophysical methods which have been introduced by Stevens present a stimulating program for the behavioral sciences and they open a new frontiere to the positive knowledge.

A simplification of the notion of degree of existence, introduced by María Manzano, is proposed. And it is suggested that actually it exactifies a notion of degree of abstraction, not of existence.

This paper offers an account of observation from a realist view. Observation is considered here as a process of information gathering from the environment; the performance of which will be more or less succesfull depending on the theories underlying this process.

Behind a succinct account about Euler and his connection with the philosophy, on show forth his arguments for to prove the effective existence of the absolute space in the Mechanica sive motus scientia (1736) and in the Reflexions sur l’espace et le temps (1748). These works constitute the Euler’s first approximation in defence of the doctrine of space held by Newton, and against: the Metaphysicians(Leibniz, Berkeley). This paper point at the possible ascendancy about Kant, especially in Von de m ersten Grunde des Unterschiedes der Gegenden im Raume (1768).

Pragmatics is the theory of conversation; more specifically, pragmatics is the discipline that studies linguistic rationality. This concept has to be interpreted as the instrumental coherence betweencommunicative goals and means. Therefore, pragmatics is essentially about the relations of relevance between utterances and contexts, understanding these as sets of beliefs held by the speaker and eventually shared by the hearer, and not as the set of objective features surrounding communicative interaction.