Years ago I didn’t like what my scale was displaying, so I took positive action. Now I feel much better about my weight and body image. The secret? I threw the scale out.
It must be 1 - what we describe as ‘weight’ is a measure of how much force your feet are exerting on the ground as a result of gravity’s pull - you can measure this force in one lump or two, but as long as there isn’t part of you touching the ground or otherwise supported by something that isn’t part of the measuring apparatus, the sum of the measured weights must add up to your total (subject to accuracy of the scales). This is how vehicle weighbridges work.