There’s em dashes in that 1978 article.
It's not just em dashes, it's 1: typewriter em dashes aka `--` and 2: usage of them in pairs, like parenthesis, that is completely different from how LLMs use them.
Proof that Djikstra was an AI model!
Literally stop the presses
Unreadable.
The typed original [1] has double hyphens that have been converted to dashes. His typewriter (Hermes Ambassador) was fixed pitch.
[1] https://www.cs.utexas.edu/~EWD/ewd06xx/EWD667.PDF