Thanks for the question! Unfortunately, the way you have diagrammed it is incorrect. “No X are Y” should be diagrammed X —> ~Y. The two versions you have below with ~M—>CB are mistaken reversals/negations. Remember, if you’re ever confused, you can rephrase in “if then” language. So for example, take the statement “No birds are mammals.” Does that mean that if something is not a bird, then it is a mammal? No, it means that if something is a bird, it’s not a mammal. That’s how you know the correct way to diagram.
Hope this helps! Feel free to ask any other questions that you might have.
