that's just 1 date that has to be matched, so you get a lower probability of matching, comparing 22 dates to 1... in the 23 person scenario, you have 23 dates t

that's just 1 date that has to be matched, so you get a lower probability of matching, comparing 22 dates to 1... in the 23 person scenario, you have 23 dates that can match with any of the 23 dates.