Can A Valid Argument Have All False Premises But A True Conclusion?

Can a fallacious argument have a true conclusion?


It is fallacious to draw any conclusion from an argument if the premises are not all true.

The definition of validity says nothing about whether the premises are actually true, but only that IF the premises are true, then so is the conclusion.

(Most other fallacies, however, won’t apply.).

What is a false conclusion?

A false conclusion is where all given reasons and evidence point to a given conclusion, but due to the omission, incorrect assumption, lie or missing piece of information required, the individual arrives at a false conclusion. There are two types of false conclusion: Valid false conclusion.

Can a cogent argument have a false conclusion?

Therefore, the argument is cogent, and so it is a good argument. This means that we can have good arguments that have false conclusions! … This is a strong argument with true premises, so it is cogent and therefore, good. But the conclusion is not guaranteed.

When the conclusion of an argument follows from the premises?

There are two types of argument: deductive and inductive. A deductive argument is one in which it is claimed that the conclusion follows necessarily from the premises. In other words, it is claimed that under the assumption that the premises are true it is impossible for the conclusion to be false.

Can an unsound argument have a true conclusion?

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.

What are some examples of inductive arguments?

Even if all of the premises are true in a statement, inductive reasoning allows for the conclusion to be false. Here’s an example: “Harold is a grandfather. Harold is bald. Therefore, all grandfathers are bald.” The conclusion does not follow logically from the statements.

Can a premise be false?

A false premise is an incorrect proposition that forms the basis of an argument or syllogism. Since the premise (proposition, or assumption) is not correct, the conclusion drawn may be in error.

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

deductive argumentMore specifically, we ask whether the argument is either deductively valid or inductively strong. A deductive argument is an argument that is intended by the arguer to be deductively valid, that is, to provide a guarantee of the truth of the conclusion provided that the argument’s premises are true.

How do you know if a premise is true?

First, one must ask if the premises provide support for the conclusion by examing the form of the argument. If they do, then the argument is valid. Then, one must ask whether the premises are true or false in actuality. Only if an argument passes both these tests is it sound.

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. Invalid: an argument that is not valid.

What is the difference between validity and truth?

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. True premises and a valid argument guarantee a true conclusion.

Do all valid arguments have true premises?

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.

What are the 2 types of inductive arguments?

There are a few key types of inductive reasoning.Generalized. This is the simple example given above, with the white swans. … Statistical. This form uses statistics based on a large and random sample set, and its quantifiable nature makes the conclusions stronger. … Bayesian. … Analogical. … Predictive. … Causal inference.

Can an argument have one premise?

A premise is a statement in an argument that provides reason or support for the conclusion. There can be one or many premises in a single argument.