《六韬》 / Six Secret Teachings
《六韬》 / Six Secret Teachings appears in 《资治通鉴·周纪》30丨苏秦的“开挂”人生 inside the episode’s version discussion of 《阴符》. The source says one possible reading of 《战国策》’s 《太公阴符之谋》 points to the 《阴符》 chapter in this military text.
The host does not use that identification as the main explanation for 苏秦’s breakthrough. The episode says the 《六韬》 chapter is only around a hundred characters and mainly concerns military communication or signaling, which makes it less plausible as the basis for Su Qin’s broader 揣摩 method than the 《史记》 label 《周书阴符》.