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[–] equilibrium 0 points 1 point (+1|-0) ago 

Very true, isolating the true affecting variables are the root of all discrepancies and errors in any scientific study and theory.

I have meant many old timers with a negative outlook on life that have lived into their mid 80's. Conversely, my grandma is the most inspiration-ally positive (imho) 93 year old I have ever meant! So who knows!