Designer, implementor, user, writer A Fragment by Donald Knuth dl.acm.org Thus, I came to the conclusion that the designer of a new system must not only be the implementor and the first large-scale user; the designer should also write the first user manual. The separation of any of these four components would have hurt TeX significantly. If I had not participated fully in all these activities, literally hundreds of improvements would never have been made, because I would never have thought of them or perceived why they were important. Eating your own dog food making
Derrière les fagots A Definition forum.wordreference.com A fagot is a bundle of branches tied with a string. They used to be kept in a corner of a barn or shed, and people used to hide things (wine, valuables, etc) behind them often for a long time, and forget about them. It is a way of saying that [a thing] is very good, but has been forgotten for a long time and recently re-discovered. wordsmemory