"I draw [a] distinction between knowledge and information. You can find information online very easily. Knowledge is another matter altogether. Now, this is not something new about the Internet [but] a basic feature of human life that while information is easy, knowledge is difficult. There has never been a shortage of mere data and opinion in human life. It’s a very old observation that the most ignorant people are usually full of opinions, while many of the most knowledgeable people are full of doubt. Other people are certainly sources of knowledge, but they are also sources of half-truths, confusion, misinformation, and lies. If we simply want information from others, it is easy to get; if we want knowledge in any strong sense of the word, it is very difficult."