The standard or dominant conception of ethical theory has two main characteristics, the first having to do with moral epistemology, the second with the nature of moral principles–the demands made on them, and the way they are to be applied. [...] The dominant model takes intuitions about particular cases as the primary ground of appeal for the authority of moral principles. A moral judgment is not counted as an 'intuition' in this sense unless it is generally accepted and made after careful consideration. But even the best intuitions about particular examples are not regarded as infallible.

Kantian Ethics (2008) - Ch. 3. Ethical Theory