'Girl number twenty unable to define a horse!'said Mr Gradgrind† 'Girl number twenty possessed of no facts, in reference to one of the commonest of animals!'† 'Bitzer'said Thomas Gradgrind.'Your definition of a horse.' 'Quadruped.Graminivorous. Forty teeth, namely twenty-four grinders, four eye-teeth, and twelve incisive. Sheds coat in the spring; in marshy countries, sheds hoofs, too. Hoofs hard, but requiring to be shod with iron. Age known by marks in mouth.' Thus (and much more) Bitzer. 'Now girl number twenty,'said Mr Gradgrind.'You know what a horse is.'

-Dickens, CharlesJohn Huffam
  Hard Times, bk.1, ch.2.