“Modern languages with a long literary tradition show a stark split between their written and spoken styles across many contexts. In current English, writing uses more varied vocabulary than conversational speech, and it uses rarer and longer words much more often. Certain structures (such as passive sentences, prepositional phrases, and relative clauses) appear more often in written than spoken language. Writers generally elaborate their ideas more explicitly through syntax whereas speakers leave more material implicit. And written language stacks clauses inside each other to a greater depth than spoken language. This is one of the most striking differences between speech and text; sentences like the opening line of the Declaration of Independence simply do not occur in conversation.”