And it came to pass that so many people suffered from trauma that it became profitable to develop and sell a way to erase the link between the sign and the bullet, the trigger and the pain. And it turned out that so much of a kludge is the human brain that what worked for trauma worked for everything else: the compound taken as the sign was experienced erased whatever emotional connotations the latter carried. Neurologists hummed in interest, clinicians shrugged in indifference, and companies rushed to make ad blockers the most heavily controlled of illegal drugs.