Phil. 1: Introduction to Logic

University of San Diego

Schedule

Lawrence M. Hinman, Ph. D.

Answer Key

Exercises 5.1

Part II

1. All B are D.

No R are D.

No R are B.

AEE-2

Valid

2. No K are Y.

Some Y are L.

Some L are not K.

EIO-4

Valid

3. All W are M.

No R are W.

Some R are M.

AEI-1

Invalid

4. No M are F.

All M are I.

Some I are not F.

EAO-3

Valid

5. Some M are I.

No I are P.

Some P are M.

IEI-4

Invalid

6. All C are U.

Some S are not U.

Some S are not C.

AOO-2

Valid

7 All P are E.

All L are P.

Some L are E.

AAI-1

Invalid

8. Some H are not P.

No H are R.

Some R are not P.

OEO-3

Invalid

9. No P are T.

All A are T.

No A are P.

EAE-2

Valid

10. Some O are not C.

All S are O.

Some S are C.

OAI-1

Invalid

Exercises 5.1

Part II

1. All B are D.

No R are D.

No R are B.

AEE-2

Valid

2. No K are Y.

Some Y are L.

Some L are not K.

EIO-4

Valid

3. All W are M.

No R are W.

Some R are M.

AEI-1

Invalid

4. No M are F.

All M are I.

Some I are not F.

EAO-3

Valid

5. Some M are I.

No I are P.

Some P are M.

IEI-4

Invalid

6. All C are U.

Some S are not U.

Some S are not C.

AOO-2

Valid

7 All P are E.

All L are P.

Some L are E.

AAI-1

Invalid

8. Some H are not P.

No H are R.

Some R are not P.

OEO-3

Invalid

9. No P are T.

All A are T.

No A are P.

EAE-2

Valid

10. Some O are not C.

All S are O.

Some S are C.

OAI-1

Invalid