*slaps random posters*

Fooruman claims to have negative mass (post #728). The scales cannot weigh negative mass. Hence to accurately find the mass of Fooruman, we need to weigh him at the same time as someone or something else.

The weight/mass (they're interchangable as far as we're concerned) of Uberbob is known to be 130lb (post #740). The weight of Uberbob's chunk of metal is 426-130=296lb (posts #728 and #740).

So, what would be the best idea here would be to weigh Fooruman *and* that chunk of metal at the same time. This will give us a value x, where x=296+Fooruman. Hence Fooruman=296-x.


Rad: return to scales. Find Uberbob's chunk of metal. Put the chunk of metal on the scales, note down the weight of it, and then get Fooruman to stand on the scales *without removing the chunk of metal*. Note down the combined weight.