I agree. It&#x27;s not a mental tax to read a word we recognize. It&#x27;s not like we have to sound it out letter by letter, we recognize its form at a glance. It&#x27;s more taxing to maintain a mapping for an inherently meaningless single character.<p>Although there are some single characters that do have meaning due to long time convention such as &#x27;i&#x27;.