夸克和轻子是同一个对象的两种读法
Quarks and leptons are two ways of reading the same object
标准模型的费米子超荷值——每个夸克和轻子的U(1)量子数——在标准模型中是经验输入，从实验中量出来填进去的。它们满足一些约束（消去规范异常），但没有第一性原理的推导。
四力篇II从DD结构出发推导一代费米子的完整超荷表。核心识别：一代16个Weyl态（含右手中微子）完全对应4DD边界结构的16个分辨像。
在DD结构里，一个4DD block有两种读取方式：native readout（直接读，读出者在block内部，能分辨三个空间轴方向）和remote readout（隔离读，读出者在block外部，无法分辨颜色，只能看到颜色singlet）。
native readout → 色三态，即夸克（携带颜色，r/g/b）
remote readout → 颜色singlet，即轻子（不携带颜色，e/μ/τ和中微子）
夸克和轻子不是两种根本不同的粒子类型，而是对同一个对象（trans-dual family object）的两种边界分辨模式。这自然解释了为什么夸克的分数电荷（1/3, 2/3）和轻子的整数电荷精确互补：它们是同一套超荷计数从不同角度读出的结果。
超荷基本量子1/6来自：一个3DD内有6个4DD面元，等权定理给出每个面元的primitive超荷为1/6。
从这个基本量子出发，加上两条结构性先验（native/remote读取规则），一代费米子的全部超荷值——u(2/3), d(-1/3), e(-1), ν(0), 以及它们的反粒子——无连续自由参数地精确复现。
可证伪预言：右手中微子（ν_R）存在且超荷为零，与see-saw机制一致。如果实验发现右手中微子带有非零超荷，篇II的推导被证伪。
The fermion hypercharge values in the Standard Model — the U(1) quantum numbers of each quark and lepton — are empirical inputs, measured from experiment and inserted. They satisfy certain constraints (gauge anomaly cancellation), but have no first-principles derivation.
Four Forces Paper II derives the complete hypercharge table for one fermion generation from DD structure. The core identification: the 16 Weyl states of one generation (including right-handed neutrino) correspond completely to the 16 resolution modes of the 4DD boundary structure.
In the DD structure, a 4DD block can be read in two ways: native readout (direct read — the reader is inside the block, can distinguish three spatial axis directions) and remote readout (isolated read — the reader is outside the block, cannot distinguish color, can only see the color singlet).
Native readout → three-color state, i.e., quarks (carrying color: r/g/b)
Remote readout → color singlet, i.e., leptons (no color: e/μ/τ and neutrinos)
Quarks and leptons are not two fundamentally different particle types, but two boundary resolution modes of the same object (the trans-dual family object). This naturally explains why quarks' fractional charges (1/3, 2/3) and leptons' integer charges precisely complement each other: they are the same hypercharge count read from different angles.
The fundamental hypercharge quantum 1/6 comes from: one 3DD contains 6 four-dimensional face elements (4DD faces); an equal-weight theorem gives each face element a primitive hypercharge of 1/6.
Starting from this fundamental quantum, plus two structural priors (the native/remote readout rules), all hypercharge values for one fermion generation — u(2/3), d(-1/3), e(-1), ν(0), and their antiparticles — are reproduced exactly, with zero continuous free parameters.
Falsifiable prediction: the right-handed neutrino (ν_R) exists with hypercharge exactly zero, consistent with the see-saw mechanism. If experiment finds a right-handed neutrino with nonzero hypercharge, Paper II's derivation is falsified.