intelligence
In plain wordsThe ability to learn, understand, reason and solve problems — especially new ones — in order to reach goals. Experts disagree about how to define it precisely, for people and even more for machines.
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General
The capacity to learn, reason, plan, understand and adapt in pursuit of goals, especially in new or unfamiliar situations. No definition is universally accepted: a 2007 compilation by Shane Legg and Marcus Hutter gathered about 70 and distilled them into one line, intelligence as 'an agent's ability to achieve goals in a wide range of environments', and their formal proposal, universal intelligenceuniversal intelligence, n.: A mathematical definition of intelligence as an agent's average ability to achieve goals across every possible environment, with simpler environments counting more., weights performance across all computable environments by their simplicity. In psychology, intelligence is measured by tests whose scores correlate positively across very different tasks, the basis of the g factorg factor, n.: The common factor behind the finding that people who do well on one kind of mental test tend to do well on others. Researchers also look for a similar general factor across AI models.. Disputes concern whether intelligence is one capacity or many, whether it requires understanding or consciousness, and how far it is relative to an environment, a body or a culture.
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AI
The property that artificial intelligenceartificial intelligence, n.: Computer systems that do things we would normally credit to a thinking mind, such as holding a conversation, reading an X-ray or planning a route, and the field of research that builds them. research seeks to build and measure in machines. Definitions range from behavioral ones, such as indistinguishability from human performance in the Turing testTuring test, n.: Alan Turing's proposed test of machine intelligence: a judge holds typed conversations with a hidden person and a hidden computer, and the computer passes if the judge cannot consistently pick it out., to measures of skill-acquisition efficiency: François Chollet (2019) defined intelligence as how efficiently a system turns prior knowledge and experience into new skills on unfamiliar tasks, and designed ARC-AGIARC-AGI, prop. n.: Puzzles made of colored grids — and, since 2026, small video-game-like worlds — that people solve easily but AI long found hard, designed to test whether a machine can learn a new skill from just a few examples. to test it. Current systems have uneven profiles, superhuman at some tasks and weak at others that people find easy (jagged intelligencejagged intelligence, n.: The uneven pattern of AI abilities: today's systems can solve very hard problems yet fail at some a child could manage, so their skills form a spiky profile rather than a smooth one.), which complicates any single scale, including proposed levels of AGIlevels of AGI, n.: A scheme from Google DeepMind researchers for grading AI by how well it performs and how broad its skills are, from emerging to superhuman, much as self-driving cars are graded by levels.. Intelligence is conceptually distinct from consciousnessconsciousness, n.: Having experiences: there being something it feels like to be you, as when you see red or feel pain. Whether any AI is or could become conscious is an open and fiercely debated question. and sentiencesentience, n.: The ability to have feelings that are good or bad for you, such as pleasure, pain, comfort or distress. It is the most common test for whether a being's welfare matters morally.: a system could be highly intelligent without experiencing anything.
Benchmark scores measure skills; whether they measure intelligence depends on how much of each skill was bought with training data.
Origin
From Latin intelligentia, 'understanding', from intellegere, 'to perceive, to choose between'. Francis Galton's studies of inherited ability (from 1869) and Alfred Binet and Théodore Simon's 1905 scale, the first practical intelligence test, began its measurement; Charles Spearman's g (1904) and Alan Turing's 1950 paper shaped the psychological and the machine conceptions respectively.
Usage note
In military, political and business usage 'intelligence' also means information about adversaries or markets. Researchers caution that IQ-style scores for AI systems are not comparable to human IQ, because a test's validity rests on assumptions about how abilities covary in people.
Related
- g factorg factor, n.: The common factor behind the finding that people who do well on one kind of mental test tend to do well on others. Researchers also look for a similar general factor across AI models.
- artificial general intelligenceartificial general intelligence, n.: AI that could learn and do almost any mental task a capable adult can, rather than excelling at one narrow job. Experts disagree on the exact bar and on when, or whether, it will arrive.
- universal intelligenceuniversal intelligence, n.: A mathematical definition of intelligence as an agent's average ability to achieve goals across every possible environment, with simpler environments counting more.
- jagged intelligencejagged intelligence, n.: The uneven pattern of AI abilities: today's systems can solve very hard problems yet fail at some a child could manage, so their skills form a spiky profile rather than a smooth one.
- ARC-AGIARC-AGI, prop. n.: Puzzles made of colored grids — and, since 2026, small video-game-like worlds — that people solve easily but AI long found hard, designed to test whether a machine can learn a new skill from just a few examples.
- superintelligencesuperintelligence, n.: A mind, usually imagined as an AI, that would leave even the cleverest people far behind in nearly every kind of thinking, not just in one game or skill. None is known to exist.
- consciousnessconsciousness, n.: Having experiences: there being something it feels like to be you, as when you see red or feel pain. Whether any AI is or could become conscious is an open and fiercely debated question.
- consciousnessconsciousness, n.: Having experiences: there being something it feels like to be you, as when you see red or feel pain. Whether any AI is or could become conscious is an open and fiercely debated question.
- sentiencesentience, n.: The ability to have feelings that are good or bad for you, such as pleasure, pain, comfort or distress. It is the most common test for whether a being's welfare matters morally.
Sources
- Legg, S. & Hutter, M. (2007). A Collection of Definitions of Intelligence. In B. Goertzel & P. Wang (eds.), Advances in Artificial General Intelligence. IOS Press.
- Chollet, F. (2019). On the Measure of Intelligence. arXiv:1911.01547.
Mentioned in
consciousnessconsciousness, n.: Having experiences: there being something it feels like to be you, as when you see red or feel pain. Whether any AI is or could become conscious is an open and fiercely debated question., sentiencesentience, n.: The ability to have feelings that are good or bad for you, such as pleasure, pain, comfort or distress. It is the most common test for whether a being's welfare matters morally., machine intelligencemachine intelligence, n.: Intelligence shown by machines; another name for artificial intelligence, preferred by some because it does not suggest that such intelligence is fake., The Last DictionaryThe Last Dictionary, prop. n.: This book: a dictionary of intelligence, human and otherwise, which explains each word first in plain language, then precisely, and says when it was born., François CholletFrançois Chollet, prop. n.: A French software engineer who created Keras, a popular tool for building neural networks, and the ARC benchmark, which tests whether AI can solve kinds of puzzles it has never seen., g factorg factor, n.: The common factor behind the finding that people who do well on one kind of mental test tend to do well on others. Researchers also look for a similar general factor across AI models., universal intelligenceuniversal intelligence, n.: A mathematical definition of intelligence as an agent's average ability to achieve goals across every possible environment, with simpler environments counting more.