Why a printed page still refuses to copy

A PDF looks like a document and behaves like a stack of ink commands. That gap is why a sentence fractures the moment it hits a chat box.

Thirty years ago the goal was simple: the same page had to look identical on every printer in the building. Coordinates were the honest answer. Paragraphs were someone else's problem.

Readers still reconstruct words by measuring gaps. Soft wraps become newlines, running heads sneak into the clipboard, and a two-column essay is read as if both gutters were one sentence.
