The research on Default in linguistic had a long history, and the terminologies used to define this phenomenon have also been verified, but better widely known as Omission. Even not a small number of the researchers ignored the difference and mixed them in usage, but in this research paper, it was found that there had been substantial difference in between. Omission is more Grammarian-based method, while Default is more Pragmatics-based method. In this applied linguistics prevailing era, the research on Omission is no longer focus on the analysis or reasonable explanation of those grammarian rules, weakening the status of Omission syntax. The conveying of information is not only through the grammar but also, or saying in a bigger portion, through the speculation during the real communication and the cognitive context behind it. The Default Function could explain this finding brief and to the point. In this paper it started with a detailed inference from the previous research on the definition of Default Function, adding the prosody component and Paralinguistic Features into “D”, redefining the scope of Paralinguistic Features, so as to revise the function for a better expression of the Default phenomenon. It is known by now, there has not been much research on this topic, and this is also the first paper on the revision and intensification of Default Function in linguistic. Hopefully the research on Default in cognitive context in this paper could make some contribution in opening the black box for further understanding our human’s brain.