What is the significance of Donum Veritatis if applied to Dubia Cardinals and Dissenting Clergy?

The Filial Correction petition on Amoris Laetetia filed by numerous priest, theologians and other lay person failed because they do not follow the evangelical guidelines of *Donum Veritatis*. In below article Cardinal Muller made a remarks; > "The defender of the right Catholic doctrine and of the people of God". With these words one of the main critics of the pontificate of Francis, the journalist Antonio Socci, rightly celebrated, some time ago, the current prefect of the Congregation for the Doctrine of the Faith, the Ratzingerian Gerhard Ludwig Müller. Just last night, the cardinal Müller did his job and intervened (the video below) during the "Vatican Rooms" program of Tgcom24: > "a possible fraternal correction of the Pope seems to me very far, it > is not possible at this time because it is not a danger for the faith, > as St. Thomas said. *Amoris Laetitia* is very clear in his doctrine > and we can interpret the whole doctrine of Jesus on marriage, the > whole doctrine of the Church in 2000 years of history". The German cardinal Brandmüller has, however, stated that Burke did not speak as a "spokesman" of the set of four cardinals, but expressed "full autonomy in its opinion, which certainly could be shared as well by other cardinals'. In any case, he reminded his colleague that any "correction" will have to "take place in the *caritatis* room". So not publicly. A suitable warning, Müller himself explained: > "The cardinals have the right to write a letter to the Pope. I was > amazed because it became public, forcing the Pope to say yes or no. I > do not like this . It is damaging for the Church to discuss these > things publicly." - [Il card. Müller: «Amoris Laetitia è chiara nella dottrina, i dubia non servono»](https://www.uccronline.it/2017/01/09/il-card-muller-fedele-alleato-di-bergoglio-e-di-ratzinger/) What is the significance of *Donum Veritatis* if applied to *Dubia* Cardinals and Dissenting Clergy?