بعض الحيوان ناطق، ولا شيء من الناطق بناهق
Some animals are rational, and no rational being brays.
بعض الحيوان ليس بناهق
Some animals do not bray.
The minor establishes that certain animals are rational; the major denies braying of every rational being. Hence braying is denied of those particular animals. The conclusion is particular negative.