A deductive argument is invalid if

Q. A deductive argument is invalid if

A. Its premises are true but its conclusion is false
B. Its premises are false but its conclusion is true
C. Its premises and conclusions are all true
D. Its premises and conclusions are all false

Answer: Its premises and conclusions are all false

A deductive argument is the presentation of statements that are assumed or known to be true as premises for a conclusion that necessarily follows from those statements.

In logic, we often refer to the two broad methods of reasoning as the deductive and inductive approaches. Deductive reasoning works from the more general to the more specific. Sometimes this is informally called a "top-down" approach. We might begin with thinking up a theory about our topic of interest.

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.

A deductive argument is invalid if Its premises and conclusions are all false

Deductive validity describes arguments that are both factual and logical. Any argument that doesn't have facts that are actually true or that are not logically sound will not pass the test as a good argument. It is important to be able to determine whether or not an argument is valid because invalid arguments are bad and should not be accepted. If you are writing an argumentative paper, you must make sure that your arguments are valid.