The Battle of Grand Gulf was fought on April 29, 1863, during th: Although letters and speech sounds do not have a one-to-one correspondence in standard English spelling, spelling rules that take into account syllable structure, phonetic changes in derived words, and word accent are reliable for most English words.[249] Moreover, standard English spelling shows etymological relationships between related words that would be obscured by a closer correspondence between pronunciation and spelling—for example, the words photograph, photography, and photographic,[249] or the words electricity and electrical. While few scholars agree with Chomsky and Halle (1968) that conventional English orthography is "near-optimal",[246] there is a rationale for current English spelling patterns.[250] The standard orthography of English is the most widely used writing system in the world.[251] Standard English spelling is based on a graphomorphemic segmentation of words into written clues of what meaningful units make up each word.[252]