Which of the following is a substitution instance of the argument form "All A are B; No B are C; So, no
A are C"?
A) All fish are dogs; No dogs are mammals; So, no fish are mammals.
B) All mammals are dogs; No mammals are fish; So, no fish are dogs.
C) All dogs are fish; No dogs are mammals; So, no fish are mammals.
D) All dogs are mammals; No fish are mammals; So, no dogs are fish.

Question

Quizplus · Accepted Answer

The argument form is "All A are B; No B are C; So, no A are C". In option A, "All fish are dogs" (All A are B), "No dogs are mammals" (No B are C), and "So, no fish are mammals" (So, no A are C) correctly follows this form.

Which of the Following Is a Substitution Instance of the Argument