The world is ambiguous, with forces and counter-forces, for good and for bad. Contradiction is the rule, with bad in the good and good in the bad, etc. And there are verbal contradictions; there is the opinion, and the other opinion, as Al Jazeera says, valid and invalid, whether such verbal debates reflect non-verbal contradictions or not. Thus, this column and author reap counter-arguments, and any author should be grateful to opponents. What can I learn? Factual mistakes? Logical? How to be so clear as to avoid misunderstandings? Or state assumptions, like ambiguity?