The Four Noble Truths of Nagarjuna

Nagarjuna is a master at applying this form of argument to apparently innocuous cases and showing that they too are empty. A cause as such is that from which something originates, while a causal condition is that whose occurrence is necessary for its existence. When Nagarjuna says that all things are empty, he is saying that all things have causal conditions on which they depend. The phrase has no reference and no real meaning since allowing the reality of a round square would land us in absurdities.