People who were rewarded whenever they acted according to their unconscious brain activity were able to learn a rule for answering questions correctly, without consciously being aware of the answer
Source:
https://www.newscientist.com/article/2253166-we-can-train-our-brain-to-access-our-unconscious-for-a-cognitive-boost/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home