The Homepage of Ernst von Glasersfeld

104Glasersfeld E. von (1986) Of knowing, telling, and showing [pdf]. Cybernetic 2(1): 64–67. Available at http://www.vonglasersfeld.com/104
104.1German translation: Chapter 3 in 196 (1997).
104.2Italian translation: Conoscere, dire e mostrare. (translated by I.P. Bolognesi).