About 1000 years ago, the last major upgrade in text took place: namely, the insertion of spaces between words. This invention, which was also developed by Medieval Scribes, made it possible, for the first time, for the vast majority of readers to be able to read silently. Prior to the insertion of spaces between words, most readers had to read out loud in order to be able to read at all. In fact, the few people who could read text silently without these spaces between words were viewed as so extraordinary that this ability is specifically recorded in historical records; these people included Julius Caesar, and St. Ambrose, the mentor of St. Augustine.
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