What is a “prudent doubt”? You should use canon law terms, not something you make up.
A prudent doubt would be one based on facts. But there are no facts which cast any doubts on +Thuc’s actions (outside of the palmaranians). This TomK poster has not provided any facts but just heresay and gossip. Doubts based on gossip are negative, per canon law. Nothing is verified.
You obviously have no facts either. And you do a disservice to +Thuc by carrying on about these fantasy “doubts”.
You might respond “Oh, I’m just asking questions.” Well, a question isn’t a doubt. Or, to put it another way, not all doubts are based on reality. Canon law says that negative doubts/ questions are to be treated as not affecting validity.
I am referring to a moral principle, and in my response was not addressing the facts concerning +Thuc's behaviour, but the attack on the approach Tom and others who agree with him, have on this issue. Reason comes before Canon law, and in fact, is the very means by which we apply Canon Law. In other words, the laws of the Church serve morality. It is not morality that serves the laws of the Church.
It is not difficult to ascertain from various sources, such as the facts recorded in the Memoriam of Fr. Guerard des Lauriers on Archbishop Thuc, and the testimony of Dr. Hiller and Dr. Heller as recorded in "The Sacred and the Profane" by Bishop Kelly, that there are legitimate suspicions surrounding his behaviour, and there is reason to suspect at the very least, that he did not know what he was doing.
This is not gossip, but testimonies from those who knew him personally. It is not detraction for another reason, the reason being that these claims are not unjustly associating him with personal faults, but are testimonies to his instability in decision-making; and the fact that he admitted to withholding intention when concelebrating the New Mass, and in the Palmar Consecrations, reveals his willingness to commit to actions externally, and not internally, at the same time.
The argument is not that there is sufficient reason to say with certitude that all of his consecrations were invalid, but that there is enough reason to avoid, and Catholic morality allows us to act according to just suspicions, when there is no other way of acquiring greater certitude. Please stop attacking a straw man.
In light of these facts, it is important to refer judgement on the matter to the decision of the Church in the future, because the Church would never allow the faithful to seek sacraments from such a person without examining the circuмstances first, surrounded as it is with reasonable doubts.
A negative doubt is based on nothing in reality; it is entirely concocted out of baseless fears. As Saint Francis de Sales taught above, a reasonable suspicion is based in reality, a reality that is enough for us to be cautious about.
An example of where this principle applies in Canon Law is in the case of marriage. If one has a reasonable doubt that one is not truly married to their spouse, the spouses are under an obligation to abstain from the use of marriage, but are not permitted to separate and marry other people if they wish to, until the question has been examined and decided by the Church.