A review of scientific literature reveals twelve characteristics commonly associated with individuals who are perceived as lacking in intelligence. Intelligence is a complex concept that incorporates a range of abilities, including cognitive abilities, problem-solving skills, adaptability, and emotional intelligence. Although there is no singular, definitive measure of intellectual deficiency, research has identified certain characteristics and behaviors that may be associated with diminished cognitive abilities. It is essential to acknowledge that these indicators are not definitive and that individual differences can vary considerably.