The Dirac Quantization Condition (DQC) for magnetic charges and its elegant Dirac-Wu-Yang (DWY) derivation based on U(1)em gauge theory predicts an electric / magnetic duality which to the best of our knowledge simply has never been observed in nature, as well as a charge quantization which is observed. The fact that this predicted duality has never been observed to our knowledge means as a matter of elementary logic that this DWY derivation (and the DQC itself) is either elegant but physically wrong, or elegant and correct but physically incomplete. This paper pinpoints a flawed assumption deeply-hidden in the DWY derivation that the south gauge field patch of the posited monopole charge differs from the north patch merely by an unobservable gauge-transformation. By correcting this assumption by defining an observable difference between the north and south patches, the DQC is made fully compatible with the non-observation of magnetic charges and its correct prediction of electric charge quantization is maintained, while the incomplete DWY derivation is made complete. Some concurrences among the corrected DWY derivation and the FQHE and the electronic structure of electrons in atoms are reported without present claim, and several experiments designed to empirically arbitrate these concurrences are proposed.