Chapter One Introduction 1.1 Preliminary remarks 1.2 Defining scalar implicature 1.3 Imperfections of Grice's theory on scalar implicatttre 1.3.1 Grice's theory of conversational implicature 1.3.2 Limitations of Grice's theory of conversational implicature 1.4 Major concerns of the present study Chapter Two Scalar implicature: Its current issues and debates 2.1 Approaches to scalar implicature in post-Gricean theories 2.1.1 Scalar implicature in neo-Gricean theories 2.1.2 Scalar implicature in relevance theory 2.1.3 Scalar implicature in other post-Gricean accounts 2.2 Scalar implicature:Its controversies in interpretation models 2.3 Questioning the previous study on scalar implicature