Of course we should consider human bodies like fingerprints: there are no two identical ones; but the limbs in rotation of the same body must main­tain the same length… On the contrary, the so-called man of Vi­tru­vi­us, but now­a­days still more by Leonardo, has succeeded in having hun­dreds of graph­ic and rep­re­sent­a­tive reproductions readapted, with any trick to for­ce the limbs to keep confined within perimeters so conceived.
Someone then con­cealed it even better, lying to others and to them­selves; but this does not cover the struc­tur­al error.

We have verified that turn­ing the arms ex­tend­ed up­wards, the sa­me mid­dle fin­ger that reach­es the ver­ti­cal side of the square, will not only be un­a­ble to touch the ex­ter­nal cir­cum­fer­ence wi­thin the area of the squa­re it­self – for an el­e­men­tary geo­met­ric prin­ci­ple – but it will cross it, go­ing beyond it a few de­grees high­er up to .a[ctual], thus elud­ing that boundary.
Note that the articulation of the shoulders is being lifted by the arms al­ways higher, slightly increasing at head level the effective .i.e distance.

If you think that all this is exaggerated, meditate that we are following stud­ies on the Golden Section –or not, published and dis­cussed with dec­i­mal places; there is even someone who echoes a ‘squaring the cir­cle’… so we place ourselves in the wake of an artist and a man of science con­sid­ered a genius! It is enough to look at the wrists to realize it.