@ YB
But if he does know the gemara , and still that his [!] tsadiq cannot make a mistake simply because he ‘is HKBH himself’ [afra lepumayu] , and like God by definition is infallible, so too is his[!] tsadiq, infallible. That is apikorsus. Clear and Pashut.
No, that would be a”z
For it to be apikorsis he would have to
1) know that Chazal contradict his view and say that he is right anyway because he knows better then Chazal. Or
2) be mvazeh Chazal in some other manner