“In order to override Type i processing, Type 2 processing must display at least two related capabilities. One is the capability of interrupting Type 1 processing and suppressing its response tendencies. Type 2 processing thus involves inhibitory mechanisms of the type that have been the focus of recent work on executive functioning=
But the ability to suppress Type 1 processing gets the job only half done. Suppressing one response is not helpful unless there is a better response available to substitute for it. Where do these better responses come from? One answer is that they come from processes of hypothetical reasoning and cognitive simulation that are a unique aspect of Type 2processing.6 When we reason hypothetically, we create temporary models of the world and test out actions (or alternative causes) in that simulated world.
In order to reason hypothetically we must, however, have one critical cognitive capability-we must be able to prevent our representations of the real world from becoming confused with representations of imaginary situations.
For example, when considering an alternative goal state different from the one we currently have, we must be able to represent our current goal and the alternative goal and to keep straight which is which. Likewise, we need to be able to differentiate the representation of an action about to be taken from representations of potential alternative actions we are trying out in cognitive simulations. But the latter must not infect the former while the mental simulation is being carried out. Otherwise, we would confuse the action about to be taken with alternatives that we were just simulating.”