Yes, in the long run there are second-order effects.
But if you’re going to predict your weight one year from now to within a couple pounds, you’d have to take into account your amount of fidgeting, your consumption of caffeine, the temperature, and the phase of the moon. Hence the Hacker’s Diet advice to keep track of your weight regularly, so that if you’re losing weight too fast or too slowly for whatever reasons you can adjust your diet to compensate.
Yes, in the long run there are second-order effects.
But if you’re going to predict your weight one year from now to within a couple pounds, you’d have to take into account your amount of fidgeting, your consumption of caffeine, the temperature, and the phase of the moon. Hence the Hacker’s Diet advice to keep track of your weight regularly, so that if you’re losing weight too fast or too slowly for whatever reasons you can adjust your diet to compensate.