System 2 in humans
System 2 is evolutionarily recent and specific to humans. It is also known as the explicit system, the rule-based system, the rational system,[12] or the analytic system.[16] It performs the more slow and sequential thinking. It is domain-general, performed in the central working memory system. Because of this, it has a limited capacity and is slower than System 1 which correlates it with general intelligence. It is known as the rational system because it reasons according to logical standards.[16] Some overall properties associated with System 2 are that it is rule-based, analytic, controlled, demanding of cognitive capacity, and slow.[12]