 Second, consider cases that involve one hearer and two sources of information. For instance, suppose that Rebecca, who is in fact a reliable testifier, tells you that traffic on I405 is bad. And suppose also that Umar, who is in fact an unreliable testifier, tells you that traffic on I90 is all clear. Finally, suppose that you do not have any reason to prefer one source of information over the other, i.e., for all you know, Rebecca and Umar are equally reliable testifiers.