To be fair, the authors don't explicitly assert that these 7 people are somehow representative of the millions of female Catholic millennials.  But NCR, like many publications, certainly presented the info about their hodge podge of 7 individuals in a way that irresponsibly (IMO) suggests to the reader that this group represents something more than what you'd learn if you walked around on the CUA campus and asked the first 7 Catholic millennial women you encountered about Monday's debate.