This can be proven for any valid argument form using a truth table which shows that there is no situation in which there are all true premises and a false conclusion.
Founded in 1994, IntraLearn Software Corporation (ISC) is a pioneer of creating e-Learning and Knowledge Organization products for corporate enterprises, academic institutions, associations, government agencies and training suppliers.
BSA (The Software Alliance) The current BSA logo. The Software Alliance, also known as BSA, is a trade group established by Microsoft Corporation in 1988 and representing a number of the world's largest software makers and is a member of the International Intellectual Property Alliance.