We can substitute letters for the categories. Then we construct the venn diagram, and compare it to the venn diagram for the conclusion. Another valid syllogism Some students are persons who went to Florida last year. All persons who went to Florida last year are persons who enjoyed themselves. No students are lazy people.
Some lazy people are employees.
Therefore, all students are employees. Some Republicans are Christians. Therefore, some professors are Christians. The following example illustrates how one would use the categorical syllogism to analyze an argument in natural language. Some students went to Florida last year for Spring Break.