Rhet gre 1419a14-16ἐὰν γὰρ οὕτως ἀπο(15)κρίνηται, ὅτι ἔστι μὲν ἔστι δ’ οὔ, ἢ τὰ μὲν τὰ δ’ οὔ, ἢ πῇ (16) μὲν πῇ δ’ οὔ, θορυβοῦσιν ὡς ἀποροῦντος.
Rhys Roberts 1924 engA fourth is when it is impossible for him to meet your question except by an evasive answer.
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