The fact that elementary fermions bind into modules, makes them elementary modules. In contrast, elementary bosons do not bind into modules. Still, both elementary particle types feature mass and may feature electric charge.
A private stochastic process that owns a characteristic function, generates the hop landing locations of the elementary particles. The characteristic function acts as a displacement generator for the produced hop landing location swarm. Consequently, the swarm moves coherently as a single unit.
Also, the footprint of a module is generated by a private stochastic process that owns a characteristic function, which acts as a displacement generator that makes the module coherently move as a single unit. This can be comprehended when the characteristic function of the module equals the superposition of the characteristic functions of its constituents. The superposition coefficients relate to the internal positions of the components.
If elementary fermions can constitute modules, and elementary bosons do not bind into modules, then the conclusion is that the characteristic functions of elementary bosons cannot superpose into the characteristic function of a module. For bosons, gravitational binding and electrical binding is not enough.