Given what we know about how our brains function, the notion of a postdictive illusion of choice makes sense. Our brains generally construct a narrative of reality in a very active process that involves perceptual attention, filtering, and selection, significant processing that weaves the various sensory streams together with our knowledge, expectations, and internal dialogue, and adding a generous helping of pure confabulation to fill in any missing pieces and make everything internally consistent. We already know that there is a temporal dimension to this construction. It is certainly plausible and consistent with existing evidence that the illusion of choice, even when that choice comes after events, can be part of that constructive process.
It also seems from this and other experiments that the question of whether or not choices are conscious or unconscious is not black or white. They are a combination, depending on events. There are certainly times when we consciously deliberate our choices, even while we may not be entirely aware of all the subconscious influences. Other choices, however, may be more automatic and involve little to no conscious choice.
Regardless of how much a choice is conscious or unconscious, we seem to be wired to have the illusion that our choices are conscious, even to the point of thinking we made a choice before we could have made it.
This has far reaching consequences for the premise of ‘free will’. Who has the free will, which consciousness we hold accountable. Or do we just hold the one accountable which can make itself heard even though in reality that consciousness actually hasn’t a clue why his body did what it did and has to concoct an explanation itself.
It also places emotions. Emotions are not ‘our’ emotions but the expression of the state of the other consciousness which for lack of further interaction the neocortex also has to determine via interpretative analysis.