A Dogma is an indisputable Divine Truth that usually should be accepted by faith.
Dogma may be a formal, explicit truth, and also a virtual implicit truth.
The said offered truth, has and expresses certain meaning, and a mission of Theology is precisely to discriminate about this truth, and to make clear, fix and enlarge this meaning so that the light of the Revealed Truth shines more and more radiantly and illuminates more and more the field of the human rational knowledge.