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# 2026-01-25 21:02:??
[[the-failure-of-risk-management]]
If I have a general complaint about [[hubbard_2020_failure]] it's this:
Hubbard fails to recognize logical parallels between his different arguments,
so to a critical reader they appear contradictory:
In [[hubbard_2020_failure#Break It Down, Then Do the Math]]
Hubbard introduces **decomposition** as a method for reducing error in estimates,
Providing Fermi's "piano tuners in Chicago" problem as an example,
without acknowledging that _Fermi_ supplied the decomposition.
Hubbard also references [[macgregor_1994_judgemental-decomposition]]
which is a similar case.
Neither of these examples suggest that decomposition is a magic bullet,
or even that a layman's decomposition wouldn't be worse than nothing.
Despite this, Hubbard ends the section without qualifier:
"Clearly, decomposition helps estimates."
This section comes only pages after
[[hubbard_2020_failure#The Measurement Inversion]]
in which Hubbard warns against seeking detail for the sake of it.
See also [[the-failure-of-risk-management#_Exsupero Ursus_]].