1. Many other varieties of deontic logic have been developed, including dynamic deontic logics. 2. Many other varieties of deontic logic have been developed, including dynamic deontic logics . 3. Yet another example of the use of the'accessibility relation'is in deontic logic . 4. Legal norms are typically represented into a logic-based formalism, such a deontic logic . 5. His thesis was concerned with deontic logic in computer science and its combination with nonmonotonic logic. 6. Such systems have sometimes been characterized as " reductions " of deontic logic to alethic modal logic. 7. Pe�a's work on deontic logic began short after his 1979 Ph . D . diss. 8. That denial pushes deontic logicians to conceive of deontic logic as the logic of duty-compliances. 9. Deontic logic faces Norms cannot be true or false, but truth and truth values seem essential to logic.10. He has written a number of journal articles on metaphysics, deontic logic , theory of morally right action, and death.