There is not one C. There are multitutdes of C. C is a recombination of the Programming language with the Compiler with the Plattform with the Code Convention of choice with the librarys chosen with the OperatingSystem (if there is one).<p>And C needs knowledge in all fields recombined to be really used freely. Know one of those fields not - and you will be like a wanderer on a frozzen lake, doomed to trust those who know to guide you by ramming posts of no return where the ice gets thin.<p>Its also about taking a sledgehammer to all those certaintys people have about computers from marketing and personal experience as consumers.