Arguments: The Svane Law

I have thought about this for the past several years — time and time again it has been proven correct — and, speaking of time, it is time to define it formally once and for all:

Here is the Svane Law:

If your only argument, or if your main argument, is that your adversary's position is outdated (or unfashionable, or antiquated, or passé, or retrogade, or an anachronism, or medieval, or so 13th century, etc, etc…) — notably in passive voices alleging objectivity and neutrality such as "Norms since those times have changed" — you have de facto lost the debate for the simple reason that you are wrong.