Can morality be grounded in reason and duty rather than consequences?
Kant's good will and duty, the distinction between hypothetical and categorical imperatives, the Formula of Universal Law and the Formula of Humanity as an end in itself, perfect and imperfect duties, and objections including conflicting duties, the role of consequences and ignoring agent partiality.
A focused answer to AQA A-Level Philosophy moral philosophy, covering Kant's good will and duty, hypothetical versus categorical imperatives, the Formula of Universal Law and the Formula of Humanity, perfect and imperfect duties, and objections such as conflicting duties, the neglect of consequences and the problem of partiality.
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What this dot point is asking
AQA wants you to explain Kant's deontological ethics: that moral worth lies in acting from duty out of a good will, the difference between hypothetical and categorical imperatives, the first two formulations of the categorical imperative, the distinction between perfect and imperfect duties, and the major objections, including conflicting duties, the apparent relevance of consequences, and the neglect of partiality and emotion.
The good will and duty
Hypothetical and categorical imperatives
The formulations of the categorical imperative
- Formula of Universal Law. "Act only on that maxim which you can at the same time will to become a universal law." Test your maxim by universalising it: if it generates a contradiction in conception (a false promise undermines the institution of promising) or a contradiction in will (no one helping others), the maxim is impermissible.
- Formula of Humanity. "Act so as to treat humanity, whether in your own person or that of another, always as an end and never merely as a means." Persons are rational ends in themselves with dignity, so deceiving or coercing someone, using them merely as a tool, is wrong.
Perfect and imperfect duties
Objections
- Conflicting duties. When two perfect duties clash (lying to a murderer to save a life), the theory gives no clear way to choose, since both are exceptionless.
- The relevance of consequences. Kant's insistence on telling the truth to the murderer at the door strikes many as morally monstrous; consequences seem to matter.
- Ignoring partiality and emotion. Acting from duty rather than love seems to misdescribe and even devalue genuinely good motives, such as helping a friend out of affection.
- Empty formalism (Hegel). Universalisability may pass through immoral maxims and block innocent ones, so the test alone does not deliver determinate moral content.
The objections developed
The two most exam-rewarded objections are the problem of conflicting duties and the worry about consequences, and they are connected. Kant's perfect duties are exceptionless, so when two of them clash (the duty not to lie against the duty to protect an innocent life, in the famous case of the murderer at the door) the theory appears to give no way to choose, and Kant's own answer (you must tell the truth) strikes most readers as monstrous. Defenders reply in two ways. First, they argue that genuine perfect duties cannot really conflict, because the universalisation test, properly applied, never licenses two incompatible exceptionless maxims, so the appearance of conflict reflects sloppy maxim-formulation. Second, some Kantians argue that the murderer forfeits the standing to be told the truth, or that the relevant maxim ("lie to a would-be murderer to save a life") can itself be universalised without contradiction, which would make Kant's own hardline verdict a misapplication of his own theory.
The consequences objection is that any theory that forbids lying to a murderer cannot be right, because outcomes plainly matter morally. The Kantian reply is that this misunderstands the role of consequences: Kant does not say outcomes are worthless, only that the moral worth of an action lies in its maxim and not in its results, partly because results are outside our control and partly because grounding duty in outcomes would make morality hostage to luck and inclination. A strong evaluation weighs this against the intuition that a moral theory must be sensitive to catastrophe, and against the related charges that Kant's focus on duty over feeling misdescribes good motives (helping a friend out of love seems better, not worse, than helping from cold duty) and that the universalisation test is an empty formalism (Hegel) that can pass immoral maxims and block innocent ones depending on how they are described.
Exam-style practice questions
Practice questions written in the style of AQA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
AQA 20175 marksExplain the difference between a hypothetical and a categorical imperative.Show worked answer →
A 5 mark "explain" wants the distinction drawn precisely, ideally with an example of each.
State it: a hypothetical imperative commands an action as a means to an end the agent happens to desire ("if you want to be healthy, exercise"), so it binds only conditionally and lapses if you drop the end. A categorical imperative commands an action as objectively necessary in itself, unconditionally and for every rational agent, regardless of any desire ("do not lie"). Add that moral duties are categorical for Kant, because their bindingness does not depend on what we want, which is why morality is grounded in reason rather than inclination. Top answers note that this is why a categorical imperative cannot be escaped by giving up a goal, whereas a hypothetical one can.
AQA 20205 marksExplain the Formula of Universal Law using an example of a perfect duty.Show worked answer →
Markers want the test applied, not just quoted.
State the formula: act only on a maxim you can at the same time will to become a universal law. Apply it to a perfect duty, the duty not to make a false promise: the maxim "I will make a lying promise to get money when convenient" cannot even be conceived as a universal law, because if everyone did so the institution of promising would collapse and no one would accept promises, so there would be nothing to exploit. This is a contradiction in conception, which marks a perfect duty (exceptionless). Top answers contrast this with imperfect duties (such as helping others), where universalising the neglect involves a contradiction in will rather than in conception, so the duty admits latitude.
AQA 202212 marksExplain Kant's two formulations of the categorical imperative and the distinction between perfect and imperfect duties.Show worked answer →
A 12 mark "explain" wants accurate exposition of both formulas and the duty distinction, connected, no evaluation required.
Explain the Formula of Universal Law (act only on a maxim you can will as a universal law) and the Formula of Humanity (treat humanity, in yourself or others, always as an end and never merely as a means), noting Kant holds these are at bottom equivalent expressions of one principle. Then explain perfect duties (exceptionless, such as do not lie or make false promises), whose maxims generate a contradiction in conception when universalised, against imperfect duties (such as develop your talents and help others), whose maxims generate only a contradiction in will and so allow latitude as to when and how we fulfil them. Connect the parts: the universal law test sorts duties into the two kinds, and the humanity formula explains why lying and coercion are forbidden (they use a person merely as a means). Top answers keep "merely as a means" distinct from "as a means", since Kant allows using people as a means provided we also respect their rational agency.
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Sources & how we know this
- AQA A-level Philosophy (7172) specification — AQA (2017)