Fr. O'Brien's statements may be, in some cases, ambiguous or invite erroneous interpretation.
Yet his works are credited with being accurate. His statement on the Mass was crystal clear. He was not ambiguous.
Again, you're suggesting a Roman Catholic ordained/trained priest doesn't understand what's happening during the Mass.
(But we've already had a fruitless go-around about "presence," so let's leave that alone for now, shall we?)
So yes, it's possible for a priest to write ambiguously, or even ignorantly. Or even heretically --- what? Don't you even watch the news? I'm on the warpath against one right now, currently resident in Rome.
2. For the, what is it, 4th time in the past 2 or 3 days: HAVE YOU READ THE CATECHISM LINKS I SENT YOU ON "ONE SACRIFICE" YET?
OK< now I'll lower my voice. Read that. It will help.