Use the Venn test of validity to determine whether the following syllogisms are valid or invalid.

1. All M is P
All M is S
? All S is P
2. All P is M
All M is S
? All S is P
3. All M is P
Some M is S
? Some S is P
4. All P is M
Some M is S
? Some S is P
5. All P is M
Some S is M
? Some S is P
6. All P is M
Some S is not M
? Some S is not P
7. All M is P
Some S is not M
? Some S is not P
8. All M is P
Some M is not S
? Some S is not P
9. No M is P
Some S is M
? Some S is not P
10. No P is M
Some S is M
? Some S is not P
11. No P is M
Some S is not M
? Some S is not P
12. No M is P
Some S is not M
? Some S is not P
13. No P is M
Some M is not S
? Some S is not P
14. No P is M
No M is S
? No S is P
15. No P is M
All M is S
? No S is P
16. No P is M
All S is M
? No S is P
17. All P is M
No S is M
? No S is P
18. All M is P
No S is M
? No S is P
19. Some M is P
Some M is not S
? Some S is not P
20. Some P is M
Some S is not M
? Some S is P


1. Invalid
2. Invalid
3. Invalid
4. Invalid
5. Invalid
6. Valid
7. Invalid
8. Invalid
9. Valid
10. Valid
11. Invalid
12. Invalid
13. Invalid
14. Invalid
15. Invalid
16. Valid
17. Valid
18. Invalid
19. Invalid
20. Invalid

Philosophy & Belief

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