simple-mindedприлагательное Lacking in subtlety or complexity; straightforward or uncomplicated in thought or behavior. Her simple-minded approach to the problem overlooked many important details.
Having or showing a lack of intelligence or sophistication; naive or foolish. He was often considered simple-minded because he believed everything he was told without question.
(dated, offensive) Relating to or characterized by intellectual disability. In the early 20th century, institutions for the "simple-minded" were sadly common.