The structure of the monoid of autarkies for clause-sets is investigated (autarkies are generalizations of satisfying (truth) assignments). The notion of a \plain clause-set" is introduced, where every clause is usable by some resolution refutation, and it is shown that a clause-set is plain ii it has no non-trivial autarky. Every clause-set has a unique decomposition into a plain sub-clause-se...

This paper examines the effect of gender and type of stem on Iranian test takers’ performance on the grammar section of a nation-wide language proficiency test. In so doing, the scores of 2931 examinees (1107 female and 1824 male) who sat Tarbiat Modares English proficiency test were obtained. The examinees’ scores on three types of MC grammar items with different kinds of stems (i.e., blank fi...

This experimental study investigated the learners’ integrative acquisition of obligatory overt subjects and subject-verb clause agreement in English as an L2. In L1 acquisition research, correlations between superficially unrelated linguistic phenomena are analyzed in terms of integrative effects. For instance, in English L1 acquisition, there is evidence for an integrative appearance of subjec...