Can you have a valid argument with a false conclusion?

FALSE: A valid argument must have a true conclusion only if all of the premises are true. So it is possible for a valid argument to have a false conclusion as long as at least one premise is false.

How can you show that an argument is not valid?

Invalid: an argument that is not valid. We can test for invalidity by assuming that all the premises are true and seeing whether it is still possible for the conclusion to be false. If this is possible, the argument is invalid. Validity and invalidity apply only to arguments, not statements.

Can a valid argument have all false premises but a true conclusion?

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.

Can an argument be almost valid?

Some arguments, while not completely valid, are almost valid. 10. A strong argument may have true premises and a probably false conclusion. If an argument has true premises and a true conclusion, we know that it is a perfectly good argument.

What does it mean for an argument to be valid or invalid?

A 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. Otherwise, a deductive argument is unsound.

Why is it an argument should be true correct and valid?

Validity: An argument is valid when, IF all of it’s premises were true, then the conclusion would also HAVE to be true. In other words, a “valid” argument is one where the conclusion necessarily follows from the premises. It is IMPOSSIBLE for the conclusion to be false if the premises are true.

Is every argument with a true conclusion valid?

All valid arguments have all true premises and true conclusions. All sound arguments are valid arguments. If an argument is valid, then it must have at least one true premise.

Which of the following is not a valid argument?

Answer: 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.