There's no need to build a labyrinth when the entire universe is one. - Jorge Luis Borges

One of the schools of Tlön goes so far as to negate time; it reasons that the present is indefinite, that the future has no reality other than as a present hope, that the past has no reality other than as a present memory. Another school declares that all time has already transpired and that our life is only the crepuscular and no doubt falsified an mutilated memory or reflection of an irrecoverable process. Another, that the history of the universe — and in it our lives and the most tenuous detail of our lives — is the scripture produced by a subordinate god in order to communicate with a demon. Another, that the universe is comparable to those cryptographs in which not all the symbols are valid and that only what happens every three hundred nights is true. Another, that while we sleep here, we are awake elsewhere and that in this way every man is two men.

Who are the inventors of Tlön? The plural is inevitable, because the hypothesis of a lone inventor — an infinite Leibniz laboring away darkly and modestly — has been unanimously discounted. It is conjectured that this brave new world is the work of a secret society of astronomers, biologists, engineers, metaphysicians, poets, chemists, algebraists, moralists, painters, geometers... directed by an obscure man of genius. Individuals mastering these diverse disciplines are abundant, but not so those capable of inventiveness and less so those capable of subordinating that inventiveness to a rigorous and systematic plan. This plan is so vast that each writer's contribution is infinitesimal. At first it was believed that Tlön was a mere chaos, and irresponsible license of the imagination; now it is known that it is a cosmos and that the intimate laws which govern it have been formulated, at least provisionally. Let it suffice for me to recall that the apparent contradictions of the Eleventh Volume are the fundamental basis for the proof that the other volumes exist, so lucid and exact is the order observed in it.

In the critic's vocabulary, the word "precursor" is indispensable, but it should be cleansed of all connotations of polemic or rivalry. The fact is that every writer creates his own precursors. His work modifies our conception of the past, as it will modify the future.