An argument where the conclusion does not follow from the premises
Ex: all cats are mammals, all whales are mammals, all cats are whales
Invalid argument
A deductive argument that is valid and has all true premises
Sound argument
What is a strong inductive argument
It is improbable that the conclusion is false given the premises are true. The conclusion follows the premises.
What is a cogent argument
An inductive argument that is strong and has all true premises