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.
BIC Italy was created in 1954 and BIC Brazil in 1956, the same year the company launched the first retractable ballpoint pen. In 1957, BIC acquired Biro Swan in England, and Waterman Pen Company in 1958 to begin its conquest of the North American market. In 1959, BIC acquired Ballograf, Scandinaviaâs leader in ballpoints and high-quality pencils, all the while pursuing its development in Africa and the Middle East.