Hea Sook: One should not readily believe urban legends. Most legends are propagated because the moral lesson underlying them supports a political agenda. People will repeat a tale if it fits their purpose. They may not deliberately spread untruths, but neither are they particularly motivated to investigate deeply to determine if the tale they are telling is true. Kayla: But people would not repeat stories that they did not believe were true. Ttherefore, one can safely assume that if a story has been repeated by enough people then it is more likely to be true.
Kayla's reply is most vulnerable to the criticism that it fails to address the claim that people will not verify the truth of a story that fits their purpose.