A credible argument is one that is logically coherent and well-supported by solid evidence and reasoning. A speaker or writer can appeal to his or her audience in a variety of ways: 2 reason or logic (logos), 2 emotion (pathos), and/or 3 ethics and morality (ethos). Authors who use logic as their main form of persuasion usually try to be as accurate as possible when describing their arguments. They may also give more attention to certain aspects of an argument, such as evidence or logic. For example, an author could argue that society should not discriminate against homosexuals because they deserve equal rights regardless of what they do with their own lives. In other words, the argument uses logic to support its conclusion that discrimination is wrong. The author would then have used evidence from history and current events to prove his point. He might also have discussed different perspectives on homosexuality, which are all valid forms of evidence that could help his audience understand why discriminating against homosexuals is wrong. Finally, he would have used logic to show how his argument is consistent with established values in society. For example, most people believe it is wrong to steal, so arguing that homosexuals should be allowed to marry would be inconsistent. The author could have stated this fact as evidence that supports his claim. Logical authors tend to focus on evidence that is relevant to their argument.