The Obvious Is Not Easy To See

Presupposition is an objective phenomenon in natural language.It's often defined as information known by both sides which pre-assumed by the speaker.Presupposition has been the important task in the philosophic and logic study from 19century,since the famous logician Gottlob Freg lead Presupposition into logic,Bertrand Rusell P.F.strawson and other logician and linguistics studied it,it draw scholar's close attention as well.Inspired by natural language achievement of presupposition,This article talk about the existence of presupposition which has indispensable function in the language of Visual Communication Design.The dissertation use the way and methods in the natural language researching to think,research,analysis and evaluate,and give the corresponding definition of presupposition.I hope that this research will provide a more depth and logical understanding of presupposition in Visual Communication Design for designers to enhance the understanding and application ability of Visual Communication Design language.