How often does one encounter the “I am not persuaded” copout? I call it a copout because it usually functions as an easy escape for one who is unable to say why a disliked argument is faulty. Here’s a formal response to the “I am not persuaded” line:
How might we recognize inappropriate doubt masquerading as valid criticism? Such doubt generally does not attend to the actual data and its explanation, falsifying it directly. It begs the question. Or, more commonly, it suggests a comparative situation but fails to supply the comparison; a given argument might be pronounced insufficient to convince, but what exactly establishes argumentative sufficiency is not stated (and usually cannot be). Of course, such judgments are meaningless without an overt standard or measure of sufficiency. And that measure is the data itself in relation to the broader object under investigation and the current explanation in play! Do these actually match up, or is a problem discernible in their relationship(s)? If the latter, the appropriate critical process should elicit doubt, along with the modification or abandonment of the hypothesis. Modification or the clear provision of an explanatory alternative is a signal that the appropriate critical method and doubt are operative. Without these elements, a doubting critic runs the danger of merely posturing.
Campbell, Douglas A. Framing Paul: An Epistolary Biography. Grand Rapids, Michigan: Eerdmans, 2014. p. 18