Borderline intellectual functioning
Encyclopedia
Borderline intellectual functioning is a categorization of intelligence
Intelligence
Intelligence has been defined in different ways, including the abilities for abstract thought, understanding, communication, reasoning, learning, planning, emotional intelligence and problem solving....

 wherein a person has below average cognitive ability (an IQ of 71–85), but the deficit is not as severe as mental retardation
Mental retardation
Mental retardation is a generalized disorder appearing before adulthood, characterized by significantly impaired cognitive functioning and deficits in two or more adaptive behaviors...

(70 or below). This is technically a cognitive impairment.

Persons who fall into this categorization have a relatively normal expression of affect for their age, though their ability to think abstractly is rather limited. Reasoning displays a preference for concrete thinking. They are usually able to function day to day without assistance, including holding down a simple job and the basic responsibilities of maintaining a dwelling.
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