 Testimony differs from the sources we considered above because it isn’t distinguished by having its own cognitive faculty. Rather, to acquire knowledge of p through testimony is to come to know that p on the basis of someone’s saying that p. “Saying that p” must be understood broadly, as including ordinary utterances in daily life, postings by bloggers on their blogs, articles by journalists, delivery of information on television, radio, tapes, books, and other media. So, when you ask the person next to you what time it is, and she tells you, and you thereby come to know what time it is, that’s an example of coming to know something on the basis of testimony. And when you learn by reading the Washington Post that the terrorist attack in Sharm el-Sheikh of 22 July 2005 killed at least 88 people, that, too, is an example of acquiring knowledge on the basis of testimony.