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{{a|devil|{{subtable|{{unknowns}}}}}}{{d|Knowable unknown|/ˈnəʊəbᵊl ʌnˈnəʊn/ (also “constructive known”) |n|}} | {{a|devil|{{subtable|{{unknowns}}}}}}{{d|Knowable unknown|/ˈnəʊəbᵊl ʌnˈnəʊn/ (also “constructive known”) |n|}}Hailing not from Donald Rumsfeld’s famous taxonomy, but the JC’s private one, a [[knowable unknown]] is something you don’t know, and can’t know, but believe you can ''as good as know'', just as long as you have enough data and clever enough [[algorithm]]s and suitable reality distortion fields and bullshit detector defeat devices installed around you. | ||
Such as that | Such as that “options will behave as predicted by the [[Black-Scholes option pricing model]]”. | ||
The problem with [[knowable unknowns]] is that they are irritatingly time-bound, and tend to be knowable at all the times where you don’t really need to know them, but then become suddenly impenetrably unknowable just when your pants are down. | |||
Victims of expiring [[knowable unknowns]] include [[Long-Term Capital Management]] in 1998, the entire [[financial services]] industry in 2008, | |||
{{sa}} | {{sa}} | ||
*[[System redundancy]] | *[[System redundancy]] | ||
*[[Unknowns]] | *[[Unknowns]] |