When you hear the counter-arguments of:  "old" "retired" "few" "radical" "right wing" "cranks", "troll"...you know your opponent has run out of argument or "quotient". deHaas uses them all liberally, but never picks up the pick and works through real arguments, such as that found here:

http://www.hprweb.com/2017/09/further-dubia-for-the-confused/