The Venn Test for Validity
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Diagram both premises — and only the premises — on three overlapping circles. If the conclusion already appears in the diagram, the syllogism is valid.
Show
Valid means the premises drew the conclusion for you.
Watch for
Diagram universal premises before particular ones; shading determines where an X can land.