Patel: It is often thought that direct experience, unlike language and culture, can always serve as common ground for communication among human beings. But people from different cultures inhabit different sensory worlds. Because selective screening of sensory data admits some perceptions while filtering out others, one person' s experience, perceived through one set of culturally patterned sensory screens, is quite different from what anyone from another culture would experience when encountering the same sensory data. Which one of the following is an assumption required by Patel's argument? ['The experience of one person is quite different from the experience of any other person.', 'No two people from different cultures ever encounter the same sensory data.', 'Two people from the same culture sometimes have different sensory screens.', 'No two people from different cultures have the same sensory screens.']