Use a Venn diagram to evaluate the following argument: "Dogs are mammals. No mammals are reptiles. So, no dogs are reptiles." This argument is _____.
A) invalid but has true premises and a true conclusion
B) valid but has false premises
C) invalid and has at least one false premise
D) None of the answers are correct
E) valid and has true premises

Question

Quizplus · Accepted Answer

The argument is valid because the conclusion logically follows from the premises. The premises that "Dogs are mammals" and "No mammals are reptiles" logically lead to the conclusion that "No dogs are reptiles." This can be visually represented in a Venn diagram where the set of dogs is entirely within the set of mammals, and the set of mammals does not overlap with the set of reptiles, thus showing that dogs cannot be reptiles.

Use a Venn Diagram to Evaluate the Following Argument: "Dogs