Thus we see that syntactic rules do not apply alike to all languages. While the principles may be at the core and apply as a common feature in all language; parameters are more language-specific and apply differently to different languages of the world. Therefore when the child learns to speak, the core principles are already innately encoded. These principles are absolute and form the common basis of the human language. And depending on the parameters of the languages that the child is exposed to, the child acquires the variations in the structures of those particular languages. When the linguist attempts to understand the syntactic rules, he tries to draw the structural similarities to derive the principles and analyses the variations across different languages to describe the parameters. All in all the application of these syntactic rules helps the child acquire the implicit knowledge of the grammar and also aid the linguist in extracting the explicit knowledge of the grammar of the human language.