This point is somewhat obscured even in the definition of a nudge, as formulated by Thaler and Sunstein. Remember, according to their definition, a nudge is “any aspect of the choice-architecture that alters people’s behaviour” in a predictable way. Hausman and Welch’s definition, on the other hand, takes intentionality into account by defining nudges as “ways of influencing choice.” Whereas Thaler and Sunstein’s definition characterizes a nudge as an objective relation between the settings of a given context and human behaviour as this unfolds, the latter definition characterizes a nudge as an intentional intervention enacted by one part to influence the choice of another part (where it is possible that these are the same, but the case that this is usually not so).