Question: Does A Valid Argument Have To Be True?

Can you have an invalid sound argument?

Question originally answered: Can a sound argument be invalid.

No, it cannot.

A sound argument is defined as a valid argument, with the extra property that the premises of the argument are true.

A valid argument is an argument which has the property that if the premises are true that then the conclusion must be true..

How can you tell if an argument is strong or weak?

Generally, strong arguments are ones that are convincing. The logical structure of the premises supports the conclusion and the audience accepts the premises. So a weak argument is one that fails either logically or the person considering the argument doesn’t accept one or more of the premises.

Can an unsound argument have a true conclusion?

No unsound arguments have a true conclusion. T F 4. If it is not possible for the conclusion of an argument to be false, then the argument is valid.

Can a deductively valid argument have false premises?

A valid deductive argument cannot have all false premises and a true conclusion. … A valid deductive argument can have all false premises and a false conclusion. 9. Whether an argument is valid has nothing to do with whether any of it’s premises are actually true.

What makes an argument valid or invalid?

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. … If this is possible, the argument is invalid.

Can arguments be true or false?

If an argument is valid, it is a valid deduction, and if its premises are true, the conclusion must be true: a valid argument cannot have true premises and a false conclusion. An argument is formally valid if and only if the denial of the conclusion is incompatible with accepting all the premises.

What is the difference between truth and validity in arguments?

In logic, truth is a property of statements, i.e. premises and conclusions, whereas validity is a property of the argument itself. If you talk of ‘valid premises’ or ‘true arguments’, then you are not using logical jargon correctly.

What type of argument has a conclusion that must be true if its premises are true?

deductive argumentA deductive argument is said to be valid if and only if it takes a form that makes it impossible for the premises to be true and the conclusion nevertheless to be false. Otherwise, a deductive argument is said to be invalid.

Can an argument have one premise?

An argument (in the context of logic) is defined as a set of premises and a conclusion where the conclusion and premises are separated by some trigger word, phrase or mark known as a turnstile. For example: 1 I think; therefore I am. There is only one premise in this argument, I think.

Does a valid argument have to have true premises?

A valid argument can have false premises; and it can have a false conclusion. But if a valid argument has all true premises, then it must have a true conclusion. … Since a sound argument is valid, it is such that if all the premises are true then the conclusion must be true.

What is an example of an invalid argument?

An argument can be invalid even if the conclusion and the premises are all actually true. To give you another example, here is another invalid argument with a true premise and a true conclusion : “Paris is the capital of France. … The premises and the conclusion of an invalid argument can all be true.

What makes good arguments?

A good argument is an argument that is either valid or strong, and with plausible premises that are true, do not beg the question, and are relevant to the conclusion. … “Since the conclusion of the argument is false, all its premises are false.” “The conclusion of this argument does not follow from the premises.