The truth conditions for conditional sentences have been well-studied, but few compelling attempts have been made to define means of evaluating iterated or nested conditionals. In particular , most approaches impose very few constraints on the set of conditionals an agent can hold after revision of its belief set. In this paper we describe the method of natural revision that ensures the preserv...

background and aim: with regard to the shortage of proper materials in persian for the evaluation of speech perception in children, this study aimed to develop the persian version of the bkb sentence test, and determine its content validity in normal persian speaking children aged 6-12 years. methods: this study was an applied research. the study procedure comprised sentence construction, deter...

This article rqjorts the results of an experiment testing Skowronski and Welboume's (1997) proposition that an elevated conditional probability for the consistent-inconsistent recall sequence in the memory incongruity paradigm can occur due to chance. Participants in the experiment were given a trait expectancy about a target, then were asked to read sentences describing the target's behaviors....

Modus ponens is the argument from premises of the form If A, then B and A to the conclusion B (e.g., from If it rained, Alicia got wet and It rained to Alicia got wet). Nearly all participants agree that the modus ponens conclusion logically follows when the argument appears in this Basic form. However, adding a further premise (e.g., If she forgot her umbrella, Alicia got wet) can lower partic...

This paper presents an extension of the semantic tableaux approach to theorem proving for the class of normal conditional logics. These logics are based on a possible worlds semantics, but contain a binary “variable conditional” operator =E= instead of the usual operator for necessity. The truth of A +B depends both on the accessibility relation between worlds, and on the proposition expressed ...