cf. Plutarch (ποτ. των ζ.φρ. κ.τ.λ 726).  οἱ δὲ διαλεκτικοί φασι τὸν κύνα τῷ διὰ πλειόνων διεζευγμένῳ χρώμενον ἐν τοῖς πολυσχιδέσιν ἀτραποῖς συλλογίζεσθαι πρὸς ἑαυτὸν ἤτοι τήνδε τὸ θηρίον ὥρμηκεν ἢ τήνδε ἢ τήνδε· ἀλλὰ μὴν οὔτε τήνδε οὔτε τήνδε, τήνδε λοιπὸν ἄρα.  But the dog is said to smell the first, the second, and the third.  If he started off on the third without smelling, he would reason.  As it is, there is no “syllogism.”