Ternary Probability as a Natural Generalization of 3-Space

<jats:p>Articles written by E. T. Whittaker in 1903 and 1904 suggest the natural generalization of 3-space as ternary probability. This is proven using basic mathematical statements and their associated transition as main eigenvalues from the product of the symmetric group S2 and the Klein four-group Z22 to the dihedral of order 12 D6 and related properties. A generalization of physical theory is suggested.</jats:p>