Theory of mind is the ability to attribute mental abilities to oneself and others and to understand that others have such abilities and that the states of the mental thoughts of others are different from one's own.[1]
↑Premack, D. G.; Woodruff, G. (1978). "Does the chimpanzee have a theory of mind?". Behavioral and Brain Sciences1 (4): 515–526. doi:10.1017/S0140525X00076512.