[JoshGray]

SO set up a situation that's non-falsifiable and claim victory.

I didn't set it up; it's just the way it is.

But then again, I'm not using terms such as "primary reason" w/o offering proof or evidence. Even with evidence, I haven't used that term.

All of your proposed causual factors are "chicken or egg" things and less than useless to anyone interested in preventing the condition.

[Maelstrom]

SO set up a situation that's non-falsifiable and claim victory.

"I didn't set it up; it's just the way it is. "

Right...and Global warming causes Ice Ages. Thank you for playing.