Thomas Aquinas first established the authority and inviolability of conscience, which was affirmed in the Second Vatican Council’s Gaudium et Spes and Dignitatis Humanae. Other commentators, like Chaput — who does not even mention the internal forum in his archdiocesan pastoral guidelines for implementing Amoris Laetitia — believe that subjective conscience must always submit to, and obey, the objective “truth” of magisterial teaching.

Source: In Amoris Laetitia, Francis’ model of conscience empowers Catholics | National Catholic Reporter