One had to wear only black, have only a rudimentary grasp of music and songwriting, and write tunes of great angst.
(James Valentine, ‘One trick pony’, ABC)
Of course, if X itself happens to be small, we still have two aspects: a property of indices is the same as a list of values h : I→ V for example, the map [(1, blond), (2, red), (3, blond), (4, black)] may be a record of composing two maps through some set X of actual people, whereby we sample I people among X, then observe their hair color; from this map alone (i. e. without further investigation, recorded by like maps) we can’t tell―and it might be crucial in a criminal investigation―whether the first and third persons were the same or merely had the same hair color.
(Lawvere & Schanuel, Conceptual Mathematics, Session 6.3)
And in Switzerland, instead of Mr King, I had another admirable teacher in Frau Karsten, a stern north German lady with grey hair in a ponytail, and she, like Mr King, rode a bicycle, sitting very upright with her grey hair bobbing along behind her.
(John le Carré, ‘Why we should learn German’, The Guardian, 2 July 2017)