I had the good fortune to have a Catholic upbringing and attend Jesuit school, and then to end up not believing in religion. The Church officially takes no pos

I had the good fortune to have a Catholic upbringing and attend Jesuit school, and then to end up not believing in religion. The Church officially takes no position on the authenticity of the Shroud of Turin. I suppose the authorities have no reason to make an official declaration either way. The Church has suffered embarrassment before trying to prove doctrine with science, or disprove science. Galileo comes to mind. The "dedicated office for investigating miracles," now known as the Dicastery for the Doctrine of the Faith, formerly the Congregation for the Doctrine of the Faith, and before that the more familiar Inquisition, investigates claims of miracles. It accepts relatively few, between 2% and 10% depending on the time period and the type of alleged miracle. I don't know if that implies that "charlatans are not tolerated in the Church," though. The Church has tolerated quite a few charlatans over its long history, and quite a few frauds and people who bought or extorted their way to bishop, cardinal, and pope. While you got it right that Catholic doctrine does not encourage or require unquestioning belief in everything, it does require faithful Catholics to believe what the Church tells them is true. Historically asking too many questions would land a curious person in trouble. These days the Church does not have the worldly power it once did to enforce its rules.