Leishman gets it wrong

So, Deuteronomy 22:11 is “obsolete”, huh? What other rules are obsolete, and how is Rory Leishman the definitive source on what we can and can’t ignore in the Bible?
London Free Press – Rory Leishman – Christianity melds reason with faith
Altogether, the Bible contains more than 600 moral rules. Some, such as the prohibition in Deuteronomy 22:11 against clothing with mixed wool and linen fabrics, are obsolete. Few faithful Christians would have any compunction about wearing a woollen suit with a linen lining.
That puzzles Merle Hertzler, an on-line village agnostic. He asks: “If the Bible is your source of guidance, why do you simply ignore this rule, and live as though it doesn’t exist? This rule is not reasonable, is it? Why would God care if we wore two kinds of fabric together? If you and I let reason override this rule, then it seems to me that reason, not the Bible, is our ultimate guide.”
Hertzler has got it wrong. For theologically orthodox Christians, Catholic and Protestant, Holy Scripture is the ultimate authority on all questions of faith and morality. Reason is the means for discerning revealed biblical truth.
There is no conflict between right reason and Christian faith. In the eloquent words of Pope John Paul the Great: “Faith and reason are like two wings on which the human spirit rises to the contemplation of truth.”