"When the facts and law are on your side, you pound those; and when they aren’t, you pound the table instead."

Professor Ed Feser has a very comprehensive post which offers the obvious reason behind Francis's indefensible (and unaccustomed) silence. Excerpt, but read the whole thing:

Why Archbishop Viganò is almost certainly telling the truth

There are five considerations that seem to me to make it very likely that Archbishop Viganò’s testimony is truthful. To be sure, given how numerous and detailed are the claims he makes, it would not be surprising if he has gotten certain particulars wrong. And perhaps in his passion he has inadvertently overstated things here and there. But the main claims are probably true. I certainly do not believe he is lying. The reasons are these:

1. The deafening silence of Pope Francis

Pope Francis has been accused of grave offenses by a churchman of high stature who was in an optimal position to know about the matters in question. Yet he has refused to deny the charges or to comment on the matter at all. That is simply not the way one would expect a person to act if such charges against him were false. You would expect him immediately, clearly, and vigorously to deny the charges.

Some of his defenders suggest that the pope is merely exhibiting a Christ-like lack of concern for his own reputation. He is not defending himself, so the claim goes, any more than Christ defended himself against those who crucified him. Yet the pope has defended himself in other contexts. For example, he has defended himself against the accusation that he is a communist and against charges that he failed to speak out forcefully enough during Argentina’s “dirty war.” After he was criticized by some on the Left for meeting with Kim Davis in 2015, the Vatican issued a statement asserting that “his meeting with her should not be considered a form of support of her position in all of its particular and complex aspects.” In 2016, the pope defended himself against criticism of his refusal to associate Islam with violence. In 2017, he defended himself against criticism of his comparison of migrant camps to concentration camps.

So, the thesis that the pope prefers to “turn the other cheek” rather than answer critics simply doesn’t withstand scrutiny. He does answer them, sometimes. Why, then, would he not defend himself against the far more serious charges now at issue, leveled by an accuser far more eminent than some of the critics the pope has answered in the past?

Furthermore, it is not merely the pope’s own reputation that is at stake. The good of the Church is at stake. There is, as people on both sides of the controversy have noted, a kind of “civil war” brewing in the Church. The pope could help prevent that if he would only respond to the archbishop’s charges. Yet he has not done so....

As the old lawyer’s saw has it, when the facts and law are on your side, you pound those; and when they aren’t, you pound the table instead.

Again, read the whole thing.