What we all feel now is the constant pressure to know enough, at all times, lest we be revealed as culturally illiterate. ... What matters to us, awash in petabytes of data, is not necessarily having actually consumed this content firsthand but simply knowing that it exists — and having a position on it, being able to engage in the chatter about it. We come perilously close to performing a pastiche of knowledgeability that is really a new model of know-nothingness. ... Whenever anyone, anywhere, mentions anything, we must pretend to know about it. Data has become our currency.
For centuries after its invention, punctuation was the province of the reader, not the writer. The average ancient Greek or Roman struggled through texts devoid of commas, periods, and even word spaces, punctuating as they went to help pick apart the words and their meaning. Well into the medieval ages, even after punctuation had been established as the writer's responsibility, readers continued to annotate their books with symbols to help index and recall the information therein.
Keith Houston, "Obsolete Punctuation Marks," 2013