Determining the validity of the arguments in the exercises of The Norton Introduction to Philosophy


How do you know if an argument is valid in philosophy?

In effect, an argument is valid if the truth of the premises logically guarantees the truth of the conclusion. The following argument is valid, because it is impossible for the premises to be true and the conclusion nevertheless to be false: Elizabeth owns either a Honda or a Saturn.

What do you mean by validity of an argument?

validity, In logic, the property of an argument consisting in the fact that the truth of the premises logically guarantees the truth of the conclusion. Whenever the premises are true, the conclusion must be true, because of the form of the argument.

How do truth and validity relate to arguments?

An argument is valid if the conclusion follows from the premises. In logic, truth is a property of statements, i.e. premises and conclusions, whereas validity is a property of the argument itself.

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What is the difference between the truth of propositions and the validity of arguments?

Truth and validity are two qualities of an argument that help us to determine whether we can accept the conclusion of argument or not. The key difference between truth and validity is that truth is a property of premises and conclusions whereas validity is a property of arguments.

How do you determine if an argument is valid or invalid?

Think hypothetically. Ask, “IF the premises are true, are we locked into the conclusion?” If yes, then the argument is valid. If no, then the argument is invalid.

What is validity and soundness of an argument?

A valid argument need not have true premises or a true conclusion. On the other hand, a sound argument DOES need to have true premises and a true conclusion: Soundness: An argument is sound if it meets these two criteria: (1) It is valid. (2) Its premises are true.

What determines the validity of a source?

In order for a source to be reliable, the information presented must be able to be repeated. The final conclusions must be able to be created again in order to reinforce the reliability of the findings.

On what does the validity of an argument depend?

The validity of an argument depends not on the actual truth or falsity of its premises and conclusion, but on whether the argument has a valid logical form. The validity of an argument is not a guarantee of the truth of its conclusion.

What are the rules of validity?

The argument must have exactly three terms. Every term must be used exactly twice. A term may be used only once in any premise. The middle term of a syllogism must be used in an unqualified or universal sense.

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What do you mean by validity?

Validity refers to how accurately a method measures what it is intended to measure. If research has high validity, that means it produces results that correspond to real properties, characteristics, and variations in the physical or social world. High reliability is one indicator that a measurement is valid.

What is the difference between proposition and argument?

An argument is a collection of statements or propositions, some of which are intended to provide support or evidence in favor of one of the others. A statement or proposition is something that can either be true or false.

What is an example of a valid argument?

A valid argument is an argument in which the conclusion must be true whenever the hypotheses are true. In the case of a valid argument we say the conclusion follows from the hypothesis. For example, consider the following argument: “If it is snowing, then it is cold. It is snowing.

What is valid and invalid arguments?

Valid: an argument is valid if and only if it is necessary that if all of the premises are true, then the conclusion is true; if all the premises are true, then the conclusion must be true; it is impossible that all the premises are true and the conclusion is false. Invalid: an argument that is not valid.

What are the examples of valid?

The definition of valid is something effective, legally binding or able to withstand objection. An example of valid is a driver’s license that hasn’t expired. An example of valid is someone giving evidence that proves an argument.

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