Theory of mind is the ability to attribute mental states—beliefs, intents, desires, pretending, knowledge, etc.—to oneself and others and to understand that others have beliefs, desires and intentions that are different from one’s own.[…}Many individuals classified as having autism have severe difficulty assigning mental states to others, and they seem to lack theory of mind capabilities. Researchers who study the relationship between autism and theory of mind attempt to explain the connection in a variety of ways. One account assumes that theory of mind plays a role in the attribution of mental states to others and in childhood pretend play. […] It has been speculated that ToM exists on a continuum as opposed to the traditional view of a concrete presence or absence. While some research has suggested that some autistic populations are unable to attribute mental states to others, recent evidence points to the possibility of coping mechanisms that facilitate a spectrum of mindful behavior. Wikipedia
it is inaccurate to say that people with AS or AS/ADHD have no theory of mind and lack empathic ability. it is not a lack of theory of mind or empathic ability, it is an overwhelming quantity and quality of the same.
in order to "attribute mental states—beliefs, intents, desires, pretending, knowledge, etc.—to oneself and others…" one needs information about the subject. without such information the number of permutations become almost infinite, thus virtually meaningless. NTs do not have information, they have assumptions, all based on themselves. NDs KNOW that the calculation is meaningless, and therefore do not bother even trying. but that is not the same as not having theory of mind or empathy. in fact it is healthy and respectful to take no action until one is asked for a specific action.