No.11
No.12
The social democracy guy also makes a response to his criticism
http://socialdemocracy21stcentury.blogspot.com/2011/01/mises-on-ricardian-law-of-association.html there seems to be a lot of back and forth in the comments section of these blog posts.
No.14
I asked this question on reddit, too. So, the basic answer is just that the added postulates obviously exist, but that they must show to be false as well? Sure, i can accept that. One could think how this works in mathematics. Mathematics is buildable or deducable from a few postulates(ZFC for example) yet is incredibly large. Does math use hidden premises perhaps?