Precisely. Knowing that even the types and quantities of food can have an impact on your caloric expenditure makes everything we're doing, at best, a complete guess. But we can guess smartly, as you've said. But ultimately, are we making healthy choices, active choices, and choices for longevity – or are we simply playing the numbers game. Playing the game leads me to momentary happiness with valleys of despair, whilst simply developing good habits pushes me ever so gradually upward. I choose health and life, and let the numbers fall where they may. :D
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