Gödel, Escher, Bach An Eternal Golden Braid by Douglas R. Hofstadter

FIGURE 135. Drawing Hands, by M. C. Escher (lithograph, 1948).

, ,

dro .. ~ i draw'

8

Strange Loop,

Or

Tangled Hierarchy

(visible)

Inviolate Level

(invisible)

FIGURE 136. Abstract diagram of

M. C. Escher's Drawing Hands. On top,

a seeming paradox. Below, its resolution.