Kraepelin writes of an as-of-yet poorly understood group of patients who may be intellectually well-endowed, yet are "absent-minded, forgetful, and show fluctuations in their intellectual capacity." They are eccentric in the sense that they tend to hold "extravagant and unworldly ideas," have a rambling or confused mode of expression, and tend to not to adjust themselves to others' experiences and instead "occupy themselves with completely hopeless and out-of-the-way plans".
