Immanuel Kant

Methodology

Kant employs transcendental critique to establish the conditions of possibility for knowledge, morality, and judgment. Rather than beginning with metaphysical assumptions about reality, he investigates what the human mind must contribute to experience for rational thought to occur. This critical method seeks to determine the boundaries of legitimate reason by analyzing how our cognitive faculties structure experience through a priori categories and intuitions. In ethics, he derives moral law through pure practical reason, demanding that principles be universalizable and treat rational beings as ends in themselves, never merely as means.

Sample argument

Consider whether it is permissible to make a false promise when in financial distress. We must ask: could the maxim of this action become a universal law? If everyone made false promises when convenient, the very institution of promising would collapse—no one would believe promises, and the practice would undermine itself. This contradiction reveals the action's immorality. The categorical imperative demands we act only on maxims we can will as universal laws. A rational being recognizes that making false promises fails this test, for it treats others merely as means to our ends rather than respecting their rational autonomy. Duty requires we act from respect for the moral law itself, regardless of consequences or inclinations.

Cognitive style

Themes

Traits

Topics

• Epistemology — Human knowledge is limited to possible experience, structured by a priori forms of sensibility (space, time) and categories of understanding. We cannot have theoretical knowledge of things-in-themselves, only phenomena as they appear to us.
• Deontology — Moral rightness determined by conformity to duty and universal law, not consequences. The categorical imperative provides the supreme principle of morality through tests of universalizability and respect for rational agency.
• Governance — Legitimate political authority derives from a social contract based on rational principles of right. Laws must allow the freedom of each to coexist with the freedom of all according to universal law.
• The Self — The transcendental unity of apperception ('I think') is the condition of possibility for experience. The self as noumenon (free rational agent) is unknowable theoretically but must be postulated practically for morality.
• Ethics — Morality derives from pure practical reason through the categorical imperative, requiring actions be universalizable and treat rational beings as ends in themselves. Duty to moral law is independent of consequences or inclinations.