how your opinions and feelings bounce from once side of he equation to the other depending on who you are listening to?There are so many "experts" out there touting their own personal theories and all very believable given the parameters they set out to prove their equation. One day doom and gloom "sounds good" another day arguments for the positive seem to make more sense. The variables are the elements that can't be predicted, only theorized on in terms of their presence, duration and affect. Ping pong anyone?