Answer: ETHNOCENTRISM ; CULTURAL RELATIVISM
Explanation: According to the scenario described, Sidney's argument represents ETHNOCENTRISM, a belief or cultural ideology whereby one's cultural value or practices is used as a basis to evaluate other people's culture such that cultural values of others are seen as inferior because it does not conform to one's ideas or values. Juan's argument on the other hand represents cultural relativism, a cultural belief whereby each culture is judged within the confines of that culture. Cultural relativism aims to respect all cultures and deviate from pronouncing inferiority judgment because a certain culture does not conform to one's cultural values.