"A final point about social information must be raised; it has to do with the informing character of the 'with' relationship in our society. To be 'with' someone is to arrive at a social occasion in his company, walk with him down a street, be a member of his party in a restaurant, and so forth. The issue is that in certain circumstances the social identity of those an individual is with can be used as a source of information concerning his own social identity, the assumption being that he is what the others are."