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DOSSIER Neil Levy, Changing One’s Minddo not live moment‐by‐moment; instead, we live by connecting ourpast to our future, and our memories are the essential thread bywhich we make these connections. This is why Alzheimer’s is such acruel disease: to watch someone gradually lose their memories todementia is to watch them almost literally unravel before youreyes.These are some of the reasons why memory matters so much to us,why we are fascinated by its loss, and by the possibility ofaltering it, augmenting it, or erasing it. Memory erasure of thekind imagined in Eternal Sunshine is unlikely to be feasibleanytime soon. Indeed, some neuroscientists wonder whether it willever be possible. Part of the problem is that memories are notstored in one place, where they can easily be accessed andaltered. Instead, at least once the memories have beenconsolidated (moved from short‐term to long‐term memory) they arestored in widespread cortical networks. Worse, so far as theprospect of targeting individual memories is concerned, theneurons involved in storing one memory (say, Joel’s memory ofmeeting Clementine) may also be involved in different memories, orperhaps different functions altogether, as well.However, there is one line of research which might offer us theprospect of targeting individual memories for erasure. Accordingto the reconsolidation hypothesis, memories are not merelyrecalled from storage whenever they are used, in the way that acomputer recalls memory from its hard drive. Instead, memory is arecreative process; when you recall a memory, you rewrite it. Now,memories are particularly vulnerable to erasure when they are new,in part because the move from short‐term to long‐term storage canbe disrupted. Football players who experience head trauma during amatch may be able to recall the plays perfectly for the fewseconds they need them in working memory, but their injury mayprevent the memory being consolidated, and the player may not beable to recall the match at all the next day. Some researchers32