«والسالبة الجزئية تنعكس إلى سالبة جزئية»
A particular negative yields a particular negative.
Original: Some animals are not human.
Intended result: Some nonhumans are not nonanimals.
Take a horse: it is an animal and not human. The same instance is a nonhuman that is not a nonanimal. Hence the negative particular conclusion is supported.
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Contraposition: Classical Rules, Validity and the Later Convention
«والسالبة الجزئية تنعكس إلى سالبة جزئية»
A particular negative yields a particular negative.
Original: Some animals are not human.
Intended result: Some nonhumans are not nonanimals.
Take a horse: it is an animal and not human. The same instance is a nonhuman that is not a nonanimal. Hence the negative particular conclusion is supported.