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218                                                                                             Syllogism
            Case 5. Some Rs are Cs. Some Cs are S.
                          Statements              Inference                     Venn Diagram

                      1. Some R are C       1. Some C are R
                      2. Some C are S       2. Some S are C                     R     C      S
                                            3. Either some R are S
                                                                                      or
                                            or No R is S.
                                                                                      C


                                                                                 R          S


            Case 6. All C are D. No D is P.

                             Statements              Inference                  Venn Diagram
                         1. All C are D        1. Some D are C
                         2. No D is P          2. No P is D
                                               3. No C is P                    C               P
                                               4. No P is C                    D

            Case 7. No C is D. All D are B

                          Statements                Inference                     Venn Diagram
                    1. No C is D             1. Some B are D
                    2. All D are B           2. No D is C                      C           D       B
                                             3. Some B are not C
                                                                                    or
                                             4. Either some C are B or
                                             No C is B.                                            B
                                                                                  C        D



            Case 8. No C is D. Some C are L
                          Statements                Inference                     Venn Diagram

                    1. No C is D             1. No D is C
                    2. Some C are L          2. Some L are C                    D         C      L
                                             3. Either some L are D or                   or
                                             No L is D
                                                                                  D     L     C
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