Intelligence test measure an individual's ability in relatively global areas such as verbal comprehension, perceptual organization, or reasoning and thereby help determine potential for scholastic work or certain occupation (Gregory,2006,P:58).E.L.Thorndike divided intelligent activity into three types: social intelligence, or ability to understand and deal with person; concrete intelligence or ability to understand and deal with things and abstract intelligence
, or ability to understand and deal with verbal and mathematical symbols (Freeman, 1963, p: 157).
Thorndike specified three clusters of mental ability: social intelligence (people skills), concrete intelligence (dealing with things), and abstract intelligence
(verbal and mathematical skills) (cited in Oakland & Parmalee, 1985).
Still, being able to carry on philosophical conversation at all, even (or especially) with an imaginary adversary, would normally be testimony of a high degree of abstract intelligence
, even if one were altogether infantile in the practical domains of life.