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# 2026-04-08 13:53:59
> [!quote] [[hubbard_2025_project-management#Conflating Uncertainty with Knowing Nothing]] (text decoration added)
> An assumption is a statement we treat as true for the sake of argument, regardless of whether it is true.
> Assumptions are necessary if you have to use deterministic accounting methods with exact points as values.
> [!quote] Hubbard et al[^1]
> An assumption is a statement
> we treat as true for the sake of argument,
> regardless of whether it is true.
> Assumptions are necessary
> if you have to use deterministic accounting methods
> with exact points as values.
> ==You rarely, if ever, know an exact point with certainty,==
> ==so any such value must be an assumption.==
[^1]: [[hubbard_2025_project-management#Conflating Uncertainty with Knowing Nothing]]
(text decoration added)
Assumptions are frowned upon in [[construction-estimating]],
but they are only made necessary by the insistence on exact values.