In particular, the garbled words of lorem ipsum bear an unmistakable resemblance to sections 1.10.32–33 of Cicero's work, with the most notable passage excerpted below

McClintock's eye for detail certainly helped narrow the whereabouts of lorem ipsum's origin, however, the “how and when” still remain something of a mystery

Creation timelines for the standard lorem ipsum passage vary, with some citing the 15th century and others the 20th.

So how did the classical Latin become so incoherent? According to McClintock, a 15th century typesetter likely scrambled part of Cicero's De Finibus

It's difficult to find examples of lorem ipsum in use before Letraset made it popular as a dummy text in the 1960s, although McClintock says he remembers coming across the lorem ipsum

So far he hasn't relocated where he once saw the passage, but the popularity of Cicero in the 15th century supports the theory that the filler text has been used for centuries.