What Makes A Sound Argument? - Fixanswer

A sound argument

must have a true conclusion

. TRUE: If an argument is sound, then it is valid and has all true premises. Since it is valid, the argument is such that if all the premises are true, then the conclusion must be true. … If an invalid argument has all true premises, then the conclusion must be false.

Can an argument be sound but not valid quizlet?

A sound argument is a valid deductive argument with true premisses. A

deductive argument cannot be both valid and unsound

. A deductive argument can be either valid or invalid and still have true premisses. When the conclusion of a deductive argument is true, the argument must be sound.

Can an invalid argument be made valid?

True or False? If an argument is invalid then it will remain invalid if we add further premises in support of the conclusion. An argument is

valid if and only if it is an instance of a valid argument form

What is an example of sound argument?

A sound argument is one that is not only valid, but begins with premises that are actually true. The example given about

toasters is valid

, but not sound. … Here, not only do the premises provide the right sort of support for the conclusion, but the premises are actually true. Therefore, so is the conclusion.

What is an example of a cogent argument?

A cogent argument is one that the truth of its premise makes the conclusion more likely to be true than false. Example: 1.

Most birds can fly

.

Is it possible to have an argument that is both invalid and sound?

It should be noted that

both invalid

, as well as valid but unsound, arguments can nevertheless have true conclusions. One cannot reject the conclusion of an argument simply by discovering a given argument for that conclusion to be flawed.

What is a valid argument PHI103?

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.

Are all invalid arguments unsound?

If

a deductive argument is invalid

, then it must also be unsound. If an argument is invalid, then it must have at least one false premise

How do you know if an argument is 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.

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. So Rome is the capital of Italy.” .

Are some propositions invalid?

An

invalid argument may have true or false premises

, and a true or false conclusion. A valid argument may have false premises with either a true or a false conclusion. The only combination that is ruled out is a valid argument with true premises and a false conclusion. Sound arguments always have true conclusions.

What is a good argument?

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.

What two things make a sound argument?

Soundness: An argument is sound if it meets these two criteria: (1) It is valid.

(2) Its premises are true

. In other words, a sound argument has the right form AND it is true. Note #3: A sound argument will always have a true conclusion.

What is a strong argument?

Definition: A strong argument is

a non-deductive argument