Arguments come in two basic types: deductive and inductive.
Deductive arguments are meant to give logically conclusive support for their conclu- sions. A deductive argument that actually provides this kind of support is said to be valid. If it also has true premises, it is said to be sound. An inductive argument is meant to provide probable support for its conclusion. An inductive argument that actually pro- vides this kind of support is said to be strong. If it also has true premises, it is said to be cogent.