http://www.youtube.com/watch?v=oIBJ1wVqCeU free will issue
Bahnsen and Van Til presuppositionalists, for some reason failed to notice that Calvinism is a tautological. My own theory is that the tautology that undergrids Greek philosophy Calvin studied and absorbed .
Van Till did not notice that Hegel formulated Meaningless sentences and what nonsense was absorbed into his philosophy from Hegel needs further study. http://en.wikipedia.org/wiki/Tautology_(rhetoric)
The tautological structure of the argument is indisputable and the conclusion thus a non-sequitur.
Bruggencate on Calvinism
https://www.youtube.com/watch?v=XANwGPaAxcc "....your free choices have been predestined by God ....." 1:24min
Which is a Reductio ad absurdum , violating the law of excluded middle(third). Free will/determinism , no third option. Free choice is the synonym of free will, not the third option to free will/non-free will.
http://theologui.blogspot.com/2014/07/why-this-calvinist-doesnt-make-much-of.html See refs. (pro Calvin view)