Radical skepticism is the view that we know nothing, or at least next to nothing. Nearly no one actually believes that skepticism is true. Yet it has re­ mained a serious topic of discussion for millennia and it looms large in popular culture. What explains its persistent and widespread appeal? How does the skep­ tic get us to doubt what we ordinarily take ourselves to know? I present evidence ...

In today’s interactive marketplace,microblog has become a powerful social marketing and advertising platform. An important type of information in microblog is consumer generated and forwarded advertising. In our study, we explore advertising effects of different social appeals through microblog. We find that oriented appeals (i.e., other-oriented and self-oriented appeals) are more effective th...