[mejohnsn]

As I read this, I now feel an even stronger need to take exception to DH4. Graham has used the same 'DH4' to classify both the legitimate counterargument, and the fallacy, so well described by another commentator as "two ships passing each other in the night".

Then again, this particular form of DH4 cannot happen unless generously supported by some _other_ fallacy or fallacies. Otherwise it would be too obvious that they were "passing each other in the night", and no one would be convinced by the arguments.