The hyperactivity sometimes accompanied by inattentiveness, impulsiveness, and forgetfulness are cardinal symptoms associated with ADHD. It is experienced as forgetfulness, mild confusion, and irritability. Memory loss is usually described as forgetfulness or amnesia. Its effects include forgetfulness, cognitive impairment and mood disturbances. Keeping with the theme of admitting his own ignorance, Socrates regularly complains of his forgetfulness. Decreased cognitive performance may cause forgetfulness and concentration loss. As described above, patients with anterograde amnesia have a wide range of forgetfulness. They can suffer decreased concentration, forgetfulness, increased frustration, or feelings of being overwhelmed. However, this is prone to mistakes and forgetfulness, as well as subjectivity. People with anterograde amnesic syndromes may present with widely varying degrees of forgetfulness. Alzheimer called it the "Disease of Forgetfulness". For Heidegger ontotheology contributes to the oblivion or forgetfulness of Being. This sleep of forgetfulness will not last forever. Unlike Gehenna, Hades typically conveys neither fire nor punishment but forgetfulness. Other proposed factors include a lack of physical closeness and forgetfulness of the recent past.