:Ang lahat ng
buhay ay mahalaga.
:Kahit na ang mamamatay-tao ay
:Kaya kahit na ang mamamatay-tao ay mahalaga.
==Modo at larawan==
Mayroong apat na modo ang silogismong pangkategorya na sinasagisag ng mga titik A,E,I
,O. Ang "A" at "I" ay daglat mula sa "AffIrmo" ng wikang Latin ("pinagtitibay ko"), habang ang "E" at "O" ay mula sa "NegO" (:itinatanggi ko").
:''A: Ang lahat ng kabayo ay mabilis tumakbo.'' (pangkalahatang pagpapatibay)
==Itutuloy ang pagsasalin==
As another example of this method, consider a syllogism of the form EIO-1. Let its first premise be "No B is an A", its second premise be "Some Cs are Bs" and its conclusion be "Some Cs are not As." This syllogism's major term is A; its minor term is C, and its middle term is B. The first premise is shown on the diagram by shading the intersection A ∩ B. The second premise cannot be represented by shading any area. Instead, we may use the ∃ (existence) symbol in the non-shaded portion of the intersection B ∩ C in order to signify that "Some Cs are Bs." (N.B. Shaded areas and [[existential quantifier|existentially quantified]] areas are mutually exclusive.) Then, since this existence symbol lies within C but outside of A, then it is correct to conclude that "There exist some Cs which are not As."
:[[Image:JohnstonDiagram_SyllogismFerio.PNG | EIO-1]]