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Which of the following statements are correct? A. A proposition and E proposition are contradictories B. A proposition and O proposition are contradictories C. E proposition and O proposition are contradictories D. I proposition and O proposition are contraries E. I proposition and O proposition are subcontraies Choose the correct answer from the options given below:
Propositional logic is referred as
1. statements logic.
2. proposition which join entire proposition.
3. argument logic.
4. proposition does not join entire proposition.
Select the correct answer:
A compound proposition that is neither a tautology nor a contradiction is called a ___________
A compound proposition that is always ___________ is called a tautology.
In a compound weighing 1200 gm, metals A and B are in the ratio 5 : 7 and in another compound weighing 800 gm, metals A and B are in the ratio 3 : 1. Find the difference between weight of metal A and metal B in the third compound which is the mixture of compound 1 and compound 2.
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R  Assertion A: A proposition is a statement about observable phenomena (concepts) that may be judged as true or false.  Reason R: When a proposition is formulated for empirical testing, it is called a hypothesis.  In light of the above statements, choose the most appropriate answer from the options given below 
Given below is a proposition: Mahatma Gandhi is called father of Nation. What kind of classical categorical proposition is it?
If c denotes the contradiction then dual of the compound statement ∼ p ∧ (q ∨ c) is
If the proposition "No Scientists are Philosophers" is true, what can be inferred about the truth or falsity of the proposition "All Philosophers are Scientists"?
Which of the following is required to know? I. The proposition must be true. II. The person must believe the proposition.