In opposition to Robortelli, who asserted the identity of the probable and the false, Piccolomini held that the probable (_verisimile_) is inherently neither false nor true, only by accident becoming one or other.[30] Of the same mind is the Spaniard Alfonso Lopez Pinciano (1596), who says the scope of poetry "_no es la mentira, que seria coincider con la sophística, ni la historia que seria tomar la materia al histórico; y no siendo historia porque toca fabúlas ni mentira porque toca historia, tiene por objeto el verisimil, que todo lo abraza. De aqui resulta que es un arte superior á la metaphysica, porqué comprende mucho mas, y se extiende a lo que es y á lo que no es._"[31] What may lie behind this notion of probability is still indefinite and impenetrable. [Sidenote: _Fr. Patrizzi_ (_Patricius_).] Moved by a wish to place poetry on a foundation other than the probable, Francesco Patrizzi, the anti-Aristotelian, composed his _Poetica_ between 1555 and 1586 in refutation of all Aristotle's main doctrines. Patrizzi notes that the word "imitation" is given many meanings by the Greek philosopher, who uses it now to denote a single word, now to describe a tragedy; at times it stands for a figure of speech, at others for a fiction: whence he draws the logical conclusion (from which, however, he shrinks alarmed) "that all philosophic and other kinds of writing and speaking are poetry, since they are made of words which themselves are imitations." He observes further that, according to Aristotle, it is impossible to distinguish between poetry and history (since both are imitations), or to prove that verse is not essential to poetry, or that history, science and art are unsuitable material for it; since Aristotle in several passages says that poetry may comprise "fable, actual occurrences, belief of others, duty, the best, necessity, the possible, the probable, the credible, the incredible, the suitable" as well as "all things worldly." After these objections, some sound, others sophistical, Patrizzi comes to the conclusion that "there is no truth in the dogma that poetry is wholly imitation; and even if it be imitation at all, it belongs not to poets alone, nor is it mere imitation of any kind, but something else not mentioned by Aristotle nor pointed out by any one else, nor yet borne into the mind of man. The discovery may possibly be made in course of time, or some one may hit upon the truth and bring it to light"; but up to the present "such discovery has not been made."[32] Yet these confessions of ignorance, these endeavours, though vain, to escape from the Aristotelian circle of ideas, and the great literary controversies of the sixteenth century concerning the concept of poetic truth and the probable had their use in that they stimulated interest by directing attention to a mystery still unsolved. Thought had once more begun to move upon the æsthetic problem, and this time it was not destined to be broken off or to lose itself.