Question#1
Question#2 The role of “it is not the case that” or “it is false that” can be described by the logical operator of negation (~)
Question#3
This is a well-known case of omnipotence paradox (http://en.wikipedia.org/wiki/Omnipotence_paradox) Generally it is a special case of Russel’s paradox (http://en.wikipedia.org/wiki/Russell%27s_paradox) The bottom line is that we cannot give any affirmative or negative answer to the question. If we say “yes, he can build the wall, which he couldn’t jump over”, we have a contradiction with the statement, that Zeus could do anything – he can’t jump over the wall, over which he can’ ...
