FALSE. 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. 7.
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Can a logical argument be valid but contain a false conclusion?
Yes, you can have a logically valid argument with a false conclusion.
Can an argument be valid but not good?
‘Valid’ does not necessarily mean good or bad. It just means succeeding in establishing conclusive support for its conclusion. Of course, the premises of this argument are false. But claiming that an argument is valid is not to claim that the premises are true.
Is a logical argument valid?
In logic, specifically in deductive reasoning, an argument is 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.
When an argument is logically valid and true it is called as?
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.
What makes an argument valid and 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. Invalid: an argument that is not valid.
Can a valid argument have false premises and 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.
Does a valid argument have to be true?
It is important to stress that the premises of an argument do not have actually to be true in order for the argument to be valid. An argument is valid if the premises and conclusion are related to each other in the right way so that if the premises were true, then the conclusion would have to be true as well.
What makes a statement valid or not valid?
Judge the reasoning and not the content (true or false statements). 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.
Does every invalid argument form have valid instances?
An invalid argument form is one that does have substitution instances with true premises and a false conclusion. The conclusion is false in lines 2 and 4. In each of these lines, there is also a false premise. Since there is no substitution instance with true premises and a false conclusion, the argument form is valid.
Can an argument be valid and unsound?
Another way to put the same idea is that an argument is valid when the truth of its premises guarantees the truth of its conclusion. either invalid or has one or more false premises; so, a valid argument is unsound if and only if it has one ore more false premises.
What is invalid argument in logic?
While individual statements may be either true or false, arguments cannot. Similarly, arguments may be described as valid or invalid, but statements cannot. An argument is said to be an invalid argument if its conclusion can be false when its hypothesis is true.
When an argument is valid and all the premises are true?
A valid argument can have a false conclusion but only if it also has at least one false premise. All valid arguments with true premises are sound. The definition of a sound argument is that it has a valid form and true premises. So, all valid arguments with true premises will be sound.
Can an argument be valid even when one of its premises is restated as the conclusion?
1 Expert Answer
A properly formed argument is said to be valid, which means that it is structured in such a way that if all of its premises are true, and all terms are used clearly and without equivocation, then the conclusion is true.
Can an argument be valid even if not statement in it is true?
TRUE: A valid argument cannot possibly have all true premises and a false conclusion. If some argument really does have all true premises and a false conclusion, then it is obviously possible for such an argument to have true premises and a false conclusion. So the argument is invalid.
Can there be a valid deductive argument containing false premises and false conclusion explain with an example?
If Elizabeth Taylor is president of the United States, then Elizabeth Taylor must be younger than 35. Elizabeth Taylor is president of the United States. So, Elizabeth Taylor must be younger than 35. For either example, the logic is valid but the premises are false.
Do all valid arguments have true conclusions?
An argument is valid if and only if: If the conclusion is true, then all the premises must be true. An argument is valid if and only if: If all the premises are true, then the conclusion must be true. An argument is valid if and only if: All the premises are true, and the conclusion is also true.
Can an invalid argument have all true premises?
If an argument is invalid, then it must have at least one false premise. If an argument has a conclusion that is certainly false, then the argument must be invalid. If the premises and conclusion are all false, the argument must be invalid. Some invalid arguments have true premises and a true conclusion.
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.
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