 There are three lines of responses to the Fast and Frugal program to mention. Take-the-Best is an example of a non-compensatory decision rule, which means that the first discriminating cue cannot be “compensated” by the cue-information remaining down the order. This condition, when it holds, is thought to warrant taking a decision on the first discriminating cue and ignoring the remaining cue-information. The computational efficiency of Take-the-Best is supposed to come from only evaluating a few cues, which number less than 3 on average in benchmarks tests (Czerlinski et al. 1999). However, all of the cue validities need to be known by the decision-maker and sorted before initiating the search. So, Take-the-Best by design treats a portion of the necessary computational costs to execute the heuristic as exogenous. Although the lower-bound for sorting cues by comparison is \(O(n \log n)\), there is little evidence to suggest that humans sort cues by the most efficient sorting algorithms in this class. On the contrary, such operations are precisely of the kind that qualitative probability judgments demand  (section 1.2).  Furthermore, in addition to the costs of ranking cue validities, there is the cost of acquisition and the determination that the agent’s estimates are non-compensatory. Although the exact accounting of the cognitive effort presupposed is unknown, and argued to be lower than critics suggest (Katsikopoulos et al. 2010), nevertheless these necessary steps threaten to render Take-the-Best non-compensatory in execution but not in what is necessary prior to setting up the model to execute.