Malcolm - that's new to me!
Aristo - that kind of backwards logic is most amusing.
I have one from my late Uncle Iolo who was a legendary teacher at Cowbridge Grammar School after the war. While the school was academically fierce the conditions for boys were very austere and the quality of food served was particularly poor.
The bread served was always stale, until a crisis one day when the stale bread ran out.
A grim-faced master said "I'm afraid we'll have to start on the fresh loaves..."