# O level Logic 2017 part 2.

#### Quiz Description

Good luck

Give one Reason Why we study logic

Correct
• To seek coherent Knowledge
• To seek for adequate truth
• To identify propositions
• To think with coherence

The statement ‘Birds fly” lacks the optimum logical form because of the absence of :

Correct
• Quantifier and copula
• Quantifier and predicate
• Copula and subject
• Copula and subject

a proposition which states alternatives is known as :

Correct
• Modal
• Categorical
• Disjunctive
• Hypothetical

The statements :”Some students are adults “and “All students are adults “, are propositions which are respectively :

Correct
• E and O
• A and I
• O and E
• I and A

0 The statement :”Only dishonest persons are thieves”, can be adequately translated into its standard form as :

Correct
• All dishonest persons are thieves
• All dishonest persons are thieves
• all thieves are dishonest persons
• All dishonest persons are thieves

In which type of categorical proposition is the subject term distributed and the predicate term undistributed ?

Correct
• E
• O
• I
• A

The venn diagram can be read off as :

A

B

C

D

Correct
• The venn diagram cab be read off as :
• No boys are liars
• same boys are liars Some boys are not liars
• Which of the following is the expression of immediate reference?

Which of the following is the expression of immediate reference?

Correct
• Conclusion is derived from only one premise
• Premise is derived from only one conclusion
• Conclusion provides for the premise
• The premise must be related to the conclusion

Which of these is False of a syllogistic argument?

Correct
• It contains proposition
• It has three terms appearing twice
• Premises are found in the conclusion
• The middle term appears in the premise

Indentify one false reason for studying the syllogism :

Correct
• An excellent tool for clarity
• A test for consistency
• It curbs hasty reasoning
• It corrects fallacies

When structure of a syllogism is violated, commits the fallacy of:

Correct
• Illicit minor
• Four terms
• Undistributed Middle
• llicit process

The fallacy of exclusive premises is committed when the :

Correct
• Two premise are negative
• Middle term is not distributed
• Two premises are particular
• Three terms do not appear twice

Identify which of the following are valid moods In the all figures of categorical syllogism :

Correct
• OAO
• ALL
• EIO
• EAO

29 Which of the following opposition Inferences have as rule:”From the truth of one, we can infer the falsity of the other “?
A
B
C
D

Correct
• Subalternation, contrariety