March 5, 2014

PHILO 110 – LOGIC

Assignment

General Instruction: Put all your answers on the spaces provided in this sheet. No erasure is allowed. Pass the accomplished seat work on Wednesday, March 5 during the class.

Name:                                                                                                                 

A.      Give the CONVERSE of the following propositions. If the proposition has no converse, write No Converse.

1.       All citizens in this country are Filipinos.

                                                                                                                                                                        .

2.       Some politicians are lawyers.

                                                                                                                                                                        .

3.       No indigents are illiterate.

                                                                                                                                                                        .

4.       There are lights in this room which are not functioning.

                                                                                                                                                                        .

5.       The president was in Malaysia.

                                                                                                                                                                        .

B.      Give the OBVERSE of the following propositions.

1.       All Supreme Court judges are intelligent lawyers.

                                                                                                                                                                        .

2.       There is no minority leader who belongs to the Administration’s party-list.

                                                                                                                                                                        .

3.       Some congressmen were involved in the PDAF scandal.

                                                                                                                                                                        .

4.       Some MILF members are not willing to give up their arms.

                                                                                                                                                                        .

5.       UN officials are people who urge China to respect international law.

                                                                                                                                                                        .

C.      Identify the truth values of the following propositions. Base your answer on the given proposition preceding them.

1.       All teachers are professionals. – True

a.       Some non-professionals are teachers. -                               

b.      No non-professionals are teachers. -                     

c.       All professionals are teachers. -                                

d.      Some non-teachers are professionals. -                               

e.      No professionals are teachers. -                               

2.       No boxers are non-fighters. – True

a.       All boxers are fighters. -               

b.      All fighters are boxers. -               

c.       Some non-fighters are boxers. -                              

d.      Some non-boxers are fighters. -                              

e.      No non-boxers are non-fighters. -                    

3.       Some teachers are doctors. – True

a.       All teachers are doctors. -           

b.      No non-teachers are doctors. -                 

c.       No doctors are teachers. -                  

d.      Some doctors are not teachers. -             

e.      Some teachers are not non-doctors. -                   

4.       Some businessmen are not arrogant. – True

a.       Some businessmen are non-arrogant. -                                

b.      No non-arrogant are businessmen. -                     

c.       Some non-arrogant are businessmen. -                                

d.      Some non-arrogant are not non-businessmen. -                              

e.      All arrogant are businessmen. -