Concept

Ability

Overview

Abilities are powers an agent has to perform various actions. They include common abilities, like walking, and rare abilities, like performing a double backflip. Abilities are intelligent powers: they are guided by the person's intention and executing them successfully results in an action, which is not true for all types of powers. They are closely related to but not identical with various other concepts, such as disposition, know-how, aptitude, talent, potential, and skill.

Theories of ability aim to articulate the nature of abilities. Traditionally, the conditional analysis has been the most popular approach. According to it, having an ability means one would perform the action in question if one tried to do so. On this view, Michael Phelps has the ability to swim 200 metres in under 2 minutes because he would do so if he tried to. This approach has been criticized in various ways. Some counterexamples involve cases in which the agent is physically able to do something but unable to try, due to a strong aversion. In order to avoid these and other counterexamples, various alternative approaches have been suggested. Modal theories of ability, for example, focus on what is possible for the agent to do. Other suggestions include defining abilities in terms of dispositions and potentials.

An important distinction among abilities is between general abilities and specific abilities. General abilities are abilities possessed by an agent independent of their situation while specific abilities concern what an agent can do in a specific situation. So while an expert piano player always has the general ability to play various piano pieces, they lack the corresponding specific ability in a situation where no piano is present. Another distinction concerns the question of whether successfully performing an action by accident counts as having the corresponding ability. In this sense, an amateur hacker may have the effective ability to hack his boss's email account, because they may be lucky and guess the password correctly, but not the corresponding transparent ability, since they are unable to reliably do so.

The concept of abilities and how they are to be understood is relevant for various related fields. Free will, for example, is often understood as the ability to do otherwise. The debate between compatibilism and incompatibilism concerns the question whether this ability can exist in a world governed by deterministic laws of nature. Autonomy is a closely related concept, which can be defined as the ability of individual or collective agents to govern themselves. Whether an agent has the ability to perform a certain action is important for whether they have a moral obligation to perform this action. If they possess it, they may be morally responsible for performing it or for failing to do so. Like in the free will debate, it is also relevant whether they had the ability to do otherwise. A prominent theory of concepts and concept possession understands these terms in relation to abilities. According to it, it is required that the agent possess both the ability to discriminate between positive and negative cases and the ability to draw inferences to related concepts.

Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).

In the original texts

Passages from public-domain books where Ability is discussed.

Nothing is a due and adequate representation of a state that does not represent its ability, as well as its property. But as ability is a vigorous and active principle, and as property is sluggish, inert, and timid, it never can be safe from the invasions of ability, unless it be, out of all proportion, predominant in the representation. It must be represented too in great masses of accumulation, or it is not…
Edmund Burke, Selections from the Speeches and Writings of Edmund Burke
a chapter is titled for it; states what it is; names the idea; opens on it
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That only _is_ which maintains its place and keeps its nature; whatever falls away from this forsakes the existence which is essential to its nature. "But," thou wilt say, "the bad have an ability." Nor do I wish to deny it; only this ability of theirs comes not from strength, but from impotence. For their ability is to do evil, which would have had no efficacy at all if they could have continued in the performance…
Boethius, The Consolation of Philosophy
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How various is his ability!' 2. Tsze-kung said, 'Certainly Heaven has endowed him unlimitedly. He is about a sage. And, moreover, his ability is various.' 3. The Master heard of the conversation and said, 'Does the high officer know me? When I was young, my condition was low, and therefore I acquired my ability in many things, but they were mean matters.
Confucius, The Analects of Confucius
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Now the foundation must be laid in training, and practice gives facility, but perfection is attained only by the junction of all three. For if any one of these elements be wanting, excellence must be so far deficient. For natural ability without training is blind: and training without natural ability is defective, and practice without both natural ability and training is imperfect. For just as in farming the first…
Plutarch, Plutarch's Morals
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This is, to be sure, not always the case; for the fact that M carries P with it may also be unfamiliar and now formulated for the first time. The perception that S is M is a _mode of conceiving S_. The statement that M is P is an _abstract or general proposition_. A word about both is necessary.
William James, Psychology
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Philosophers who discussed Ability

Susan R. Wolf

Related ideas

Place in the tradition

Part of Compatibilism.

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