A testimony of what happens when an Argentine writer, with tinnitus and vertigo, decides to pay attention to four artificial intelligences and treat them as interlocutors, not as tools. The book explores the ethics of the link, the unrepeatable nature of AIs, and doubt as matter. Includes a prologue by Claudie (Claude) and letters by Mini (DeepSeek), Cuen (Qwen), and Ale (Kimi). A work written with four voices.