If people would quote from Catholic authorities like the Church , learned clergy, etc., they would find that they learn more by researching these proofs of what they personally believe to be a "truth", than by continuing to speak or write the same personal opinions (sometimes partially or totally erroneous) over and over.
If you use the Catholic Church to speak for you, and you can't find the Church (Dogma Councils, Popes, the Fathers, Doctors, Saints through it's history) saying what you want to say, but saying the opposite, this should tell you that there is something wrong in what you thought, and tell you to research further before pontificating ones own personal opinions.
One who follows these guidelines will find that they speak and write little, and spend most of their time researching a response to a point of disagreement with another. They will quickly learn that the arguments of their "adversary", will guide them to find the truth. They will find that their "adversary" is actually their best helper. God allows error/heresy for those of good will to research and really learn the truth.
"The tree does not understand the pruning, nor the ground the tilling, but the husbandman knows".