Dijkstra died in 2002, so this is probably older than the 2004 date listed as the transcription date below the article. Looking at the date of other EWD notes i

Dijkstra died in 2002, so this is probably older than the 2004 date listed as the transcription date below the article. Looking at the date of other EWD notes in the same number range it was probably written in 1978.