Borgesian kids say the darndest things

This is from a 1949 entry in Adolfo Bioy Casares' diary entries on Borges:

Noviembre.  A los cinco años de edad, Luis, el sobrino de Borges, desesperaba a su hermano Miguel Jorge, de tres años, diciéndole:  "Vos no sos Miguel Jorge." (p. 46)

November.  At five years of age, Luis, Borges' nephew, was despairing of his brother Miguel Jorge, three years of ago, saying to him:  "You are not Miguel Jorge."

A Borgesian putdown at five.  Nice.