That blog defendingjehovahswitnesses is really a gem!
Strong arguments used there
As for the 1975 debate:
1, It "forgets" to mention some facts - "selling houses" OKM, Sinutko's talks, ... Kind of symptomatic for WTS supporters - the org is doing the same in the publication.
2, Arguing the "slave" is not a false prophet as they do not claim inspiration. Yes, they are not inspired, they are only "God's communication channel" - this contradiction have been discussed so many times and still somebody uses it as an argument.
3, Red herring in form of attack on Christian churches that in absolutely not relevant to the 1975 fiasco.
4, Talking about two sets of rules used by "opposers" when in reality WTS uses two sets of rules for everything...