Who gets to define what constitutes being a "Protestant"? The Protestant being asked the question, or the Catholic doing the asking? Will the term be defined, before the answer is demanded?
FWIW, I liked ealgeone's prior answer.
It seems to me two parties discussing a subject shood come to mutual agreement about terms used in such a discussion. So for example, if the term “Protestant” is used in a discussion about Catholicism, if there is disagreement about what a “Protestant” is, both parties should establish that definition before proceeding or else the discussion is meaningless.
This kind of mutual agreement is usually acomplished through interrogatories, by both parties, until a mutually agreeable definition is reached. Or not reached, and if not then the conversation ends right there.
It seems to me a lot of time is wasted back and forth when many do not agree on basic definitions to begin with. Without such, again any further correspondence is pointless