Beer and 3 Philosophers

PLEASE ANSWER THE FOLLOWING QUESTIONS BY ONLY USING THREE ARTICLES PROVIDED. DO NOT USE ANY OUTSIDE SOURCES. ALSO DO NOT PLAGIERISE (250 WORDS MIN)

QUESTION. Descartes, Hume and Kant walk into a bar and order beer. The barman asks each of them to identify the beer that he wants to drink. They do it by using their philosophical approaches. Explain how they would do it. What problems could they have with their orders if the barman strictly follows their identification of their order?