Adventures in Juvenile Lexicography

Katherine Nelson, in Keith Nelson, ed., Children’s Language (1978), p. 66,  offered the following glimpse into the orismological instincts of budding lexicographers.  Asked a “What is it?” question about the word tiger (“a large, fierce, flesh-eating animal (Panthera tigris)…” to you and me), the tots responded:

(1) “at the zoo”
(2) “animal”

(3) “it’s like a lion:

(4) “lives in the jungle and runs a lot”

(5) “animal with stripes and it eats a lot of things”

(6) “to run”

(7) “someone growls”

(8) “hair on its head”

I then polled our son (aet. su. 4 years,  3 months), who offered this:

   “It’s something that is big, and it eats people, and it runs around in the jungle.”

His assessment of her other examples:

apple: “it’s juicy; it’s big; it’s round”

car:  “Something that’s big, and not so tall -- it’s this tall [shows with his arms];  it can kill someone that stays in front of it, if it’s moving.”

coat: “It’s something that keeps you warm, is big and sort of smooth, and has little furry stuff”  [Note:  Our family was at that time facing an Edmonton winter]

bed:  “It has legs, or doesn’t, and it has a pillow, and it stands up on its posts”.
[Note: That first idea in the definiens, at once oddly precise and maddeningly vague, probably meant:  “Prototypically a bed has legs (the ones you see in books), but ours doesn’t” -- the family, indeed, then in exile and furniture-poor, slept on a mattress on the floor.]

Striking  is this repeated note of ‘big’, present in every definition except the last:  extending even to the humble apple -- even a baby is bigger than an apple, let alone a robust four-year-old.   But in light of the lad’s subsequent specialization in differential geometry, an explanatory hypothesis presents itself.  What may well have struck him was the apple’s unabashed convexity -- round, not like a thin dime, but round all around:  having everywhere positive and (roughly) constant Riemannian curvature, as he would no doubt rephrase the definition upon more mature reflection.  Such an apperception of an apple was indeed the Eureka moment of the founder of differential geometry, Carl Friedrich Gauss, as depicted in the movie “Die Vermessung der Welt”.