In general, if you don’t understand what someone is saying, it’s better to ask “what do you mean?” than to say “are you saying [unrelated thing that does not at all emerge from what they said]??” with double punctuation.
In general, if you don’t understand what someone is saying, it’s better to ask “what do you mean?” than to say “are you saying [unrelated thing that does not at all emerge from what they said]??” with double punctuation.