 With regard to the speaker, persuasion is accomplished whenever the speech is held in such a way as to render the speaker worthy of credence. How is it exactly that the credibility of the speaker contributes to persuasion? Aristotle is not overly explicit on this issue. However, he says that people follow the trustworthy speaker more easily and more quickly on almost all subjects and completely so in affairs in which there are not exact criteria (to decide the case), but only wavering opinions (Rhet. I.2, 1356a6–8). This might be taken to mean that in the absence of other criteria to decide a case, the audience will form the second-order judgment that suggestions put forward by a credible speaker are themselves received as trustworthy and acceptable. Also, according to this remark, the impact of what seems to be the speaker’s character comes in degrees; it is most important, if the point of issue is such that it leaves room for doubt and cannot be decided by conclusive proofs.