This is a great website and after reading the entire discussion, I changed to lower case after my colon in the following sentence. However, is it too messy to include the semi-colon?

"However, even this agreement presents a problem: since the time for a chain to diffuse via reptation over a distance equal to its contour length should increase as M (eqn 1.46), if D ~ M??, then n0 and ?d should vary as M1+?; that is, the respective experimental M-dependences of the viscosity and diffusion constant are mutually inconsistent."