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An argument form is invalid if and only if,

An argument form is invalid if and only if, Correct Answer it has substitution instances with true premises and a false conclusion

Related Questions

which one of the following is not correct?
1. If one of the premises is invalid, the argument is not true
2. An argument cannot be sound if one of the premise is false
3. If premises entail the conclusion then the argument will be valid
4. A deductive argument may be valid without being sound
The question given below consists of a statement, followed by two arguments numbered I and II. You have to decide which of the arguments is a 'strong' argument and which is a 'weak' argument. Statement: Should women serve in combat units? Arguments: I. Yes, allowing women to serve in combat units is a positive step towards gender equality. II. No, women are the most emotional gender in India Give answer: (A) If only argument I is strong (B) If only argument II is strong (C) If either I or II is strong (D) If neither I nor II is strong and
Which of the following statements are correct with reference to the argument by analogy? A. It is a deductive type of argument B. It is an inductive type of argument C. It is not intended to be mathematically certain D. It is to be classified as either valid or invalid E. Its conclusion does not follow from the premises with logical necessity Choose the correct answer from the options given below:
All mortals are men. Socrates is mortal Therefore Socrates is a man. Which of the following statements are true of the above argument? (A) Above arguments is sound. (B) Above argument is valid. (C) Above argument is fallacious. (D) Above argument commits the fallacy of undistributed middle. Choose the correct answer from the options given below:
What is the output of this program ? class main_arguments {
public static void main(String [ ] args)
{
String [][] argument = new String[2][2];
int x;
argument[0] = args;
x = argument[0].length;
for (int y = 0; y < x; y++)
System.out.print(" " + argument[0][y]);
}
}
In an election, there were only two candidates. The winning candidate got 48% of the total votes. His opponent got 6800 votes which was 34% of the total votes. Some of the votes were invalid. The winning margin of the candidate who won the election and the number of invalid votes respectively are:
In an election in a constituency of Maharashtra, only two candidates participated where one of them got 55% of the total valid votes and 20% votes were invalid. If the number of invalid votes was 1100. How many valid votes did the other person get?
Which of the following statements correctly apply to inductive arguments? A. They are neither conclusively valid nor invalid. B. Adding new premises makes no difference to the argument. C. Adding new premises may strengthen/weaken the argument. D. Conclusion follows from premises with absolute necessity. Choose the correct answer from the options given below:
The following question is based on the given data for an examination. A. Candidates appeared 10500 B. Passed in all the five subjects 5685 C. Passed in three subjects only 1498 D. Passed in two subjects only 1250 E. Passed in one subject only 835 F. Failed in English only 78 G. Failed in Maths only 275 H. Failed in Physics only 149 I. Failed in Chemistry only 147 J. Failed in Biology only 221 How many candidates passed in at least four subjects ?
Each question given below consists of a statement, followed by two arguments numbered I and II. You have to decide which of the arguments is a 'strong' argument and which is a 'weak' argument   STATEMENT: Should higher education be made free in India. ARGUMENT: 1    Yes. This is the only way to provide education to people. 2    No. It would add extra pressure to the finance department.