There was no way I was twenty-one. I looked nineteen at a push. Maybe sixteen-and-a-half, which is what I was. Big though – not fat – but tall. No baby-face and no bum-fluff moustache. The fisher boys had their bum-fluff moustaches and they looked total pricks.

This structure, we suggest, will show more clearly when examined in the language of geometry rather than in the language of differential equations, more readily in Regge calculus than in Ricci calculus, and more directly from a geometry idealized to be blockwise flat than from functions idealized to be piecewise linear.

Higgledy-piggledies are more sophisticated than clerihews: they comprise double dactyls and rhymes and aren't always biographical.

Womanhood was achieved at twenty-one, when the female was adulted; manhood was fully achieved at twenty-five, […]