This course aims to build on students' knowledge of morphological, syntactic, semantic and pragmatic theories acquired in earlier courses, and to develop students' research ability through examining more advanced issues in formal linguistics, with emphases put on the following respects: (i) acquisition of in-depth knowledge of current issues in formal linguistics, with reference to their methodological assumptions, (ii) critical review of relevant literature, and (iii) independent formulation of hypotheses/theories.