That conclusion could be true, but it isn't a logical conclusion from the argument you provided. A more appropriate one would be some dogs that like bacon play fetch.

One way I found to visualize this is by using your hands. On one hand, hold up three fingers to represent 'most A are B.' On the other hand, hold up three fingers for 'most A are C,' then bring your hands together. No matter what you do, at least one of your fingers will overlap. Hopefully, that helps someone!

From what I understand, as J.Y. explained, you're negating the relationship. Keep in mind that negation isn’t the same as stating the opposite; it simply means that the item in question is not true or applicable. So, if some dogs are friendly, then it's not the case that all dogs are friendly.

I felt the same way, but I believe it’s a modifier.

Review and practice!