It's not a technicality, it's just rounding. Go check out the nutrition labels on various foods you got. The majority of them will be rounded to the nearest tenth. A few low calorie ones might be rounded to the nearest fifth. Less than that is for all practical purposes 0 calories. You will not get a significant amount of calories no matter how many pickles you eat. Forget the sodium and acidity, your body cant hold enough pickle mass to add up to a snack's worth of calories.