American novelist William H. Gass writes in his essay “Imaginary Borges and His Books” in Fiction and the Figures of Life (1970):

And which is Borges, which his double? … there is the Borges who plays with the notion that all our works are products of the same universal Will so that one author impersonally authors everything (thus the labors of that provincial librarian are not in vain,) and the Borges whose particular mark is both idiosyncratic and indelible. The political skeptic and the fierce opponent of Peron: are they the same man? … Is this impish dilettante the same man who leaves us so uneasily amazed?