I am obviously talking in the context of programming, not abstract math ;-) In this context, it's quite obvious that I am correct. Programmers around the world

I am obviously talking in the context of programming, not abstract math ;-) In this context, it's quite obvious that I am correct. Programmers around the world wouldn't have been perplexed for a decade because of a labyrinthine quote from Mac Lane's Categories for the Working Mathematician.