If system 1 contaminates the rationality of deontological judgments due to its emotional and primitive evolutionary nature, it equally contaminates consequentialist judgments about value.
One who believes that the rightness or otherwise of an act is in some way dependent on consequences.
rationality(Traditional conception being challenged by epistemic relativists)
A cognitive virtue and hallmark of the scientific method, intimately tied to requirements of consistency, justification, warrant, and evidence for beliefs.
system 1(Dual-process theory applied to moral psychology)
A mode of cognitive processing characterized as emotional and primitive in evolutionary origin, which plays an essential role in evaluative judgments about whether consequences are good or bad.
The story taken just this far, whatever its merits, appears to allow the possibility of moral knowledge grounded in consequentialist reasoning. All the data used to draw negative conclusions about deontological moral thought, however, can be interpreted to support a broader debunking argument, since consequentialist thinking requires not only reasoned calculation of the probable effects of alternative actions, but also judgment about whether these effects are good or bad (Kahane 2011, pp. 119–20