Obviously, I sample several and conclude that the rest are sour. That process, known as inferential logic, is a perfectly valid source of knowledge if you understand its limits and operate within them. It is not always clear in our minds where the source of our knowledge lies. By understanding how we not only possess knowledge but also create it beyond direct experience, it is often possible to know more than we know. In subsequent chapters, this wonderful human characteristic will be put to use.
Experiential knowledge is private and personal.
Nobody can do it for you, and you cannot learn for somebody else. Surgeon General's label sounds convincing to me. My grandmother shows me how to bake her famous coffee cake. I watch a video on glass blowing. Of course, the first choice is the most defensible.