Some exercise questions are easy. Some f is non-v. Some eligible voters are persons who do not vote. I am a thinking being. Therefore, I am an existing being.
All communists are persons who practice what they preach.
Some good Christians are persons who practice what they preach. Therefore, Some good Christians are communists. All persons who are stupid are persons who swallow propaganda. No logic students are persons who are stupid. Therefore, No logic students are persons who swallow propaganda.