Please understand that there are much more relevant factors to the use of fingerprint to fingermark comparison evidence in court than their ability to discriminate under ideal laboratory conditions.

For some information see:

National Institute of Standards and Technology, National Institute of Justice, February 2012 report: "Latent Print Examination and Human Factors: Improving the Practice through a Systems Approach" (http://nij.gov/pubs-sum/latent-print-human-factors.htm)

In general there is a move towards probabilistic assessment of the strength of evidence (likelihood ratios), which offers a logically correct way of approaching problems in the forensic evaluation of evidence.