The attack on Pulse nightclub in Orlando has renewed calls for anti-terrorist action from politicians across the board. For presumptive Democratic nominee Hillary Clinton, this has meant a revival of her call for a government/Silicon Valley alliance that would analyze social networks in order to thwart terrorist plots and impede potential radicalization.

It’s an attractive solution but one, as we’ve explored before, that is far more complicated than it might sound. This week we revisit two conversations we had last January, when a US government delegation met with Silicon Valley executives to discuss just such an approach. Karen Greenberg, director of the Center on National Security at Fordham University School of Law, talks about how a neutral-sounding algorithm for scanning radicalization raises numerous legal red flags. And terrorist behavior expert John Horgan explains how this approach fundamentally misunderstands how radicalization happens and why we must be careful distinguishing between those who consume extremist content and those who intend to act on it.