Toxic speech inflicts damage to mental and physical health. This process can be chronic or acute, temporary or permanent. Understanding how toxic speech inflicts these harms requires both an account of linguistic practices and, because language is inherently social, tools from epidemiology. This paper explores what we can learn from two epidemiological models: a common source model that emphasizes poisons, and a propagated transmission model that better fits contagions like viruses.

ABSTRACT In Habgood-Coote : 1033–1065) I argued that we should abandon ‘fake news’ and ‘post-truth’, on the grounds that these terms do not have stable public meanings, are unnecessary, and function as vehicles for propaganda. Jessica Pepp, Eliot Michaelson, and Rachel Sterken and Étienne Brown : 144–154) have raised worries about my case for abandonment, recommending that we continue using ‘fake news’. In this paper, I respond to these worries. I distinguish more clearly between theoretical and political reasons for abandoning (...) a term, assemble more evidence that ‘fake news’ is a nonsense term, and respond to the worries raised by Pepp, Michaelson and Sterken, and Brown. I close by considering the prospects for anti-fascist and anti-authoritarian conceptual engineering. (shrink)