As suggested in the introduction, companion modelling is a stance, not merely an approach. By stance we mean someone's moral attitude. By analogy with the analysis of literary stances by Meizoz (2007), we consider that the scientist involved in 'implicated' research becomes part of the social play. So in a companion modelling approach, he goes beyond the boundaries of the scientific field. He enters the public arena and sends out a certain image of himself. His stance presents a double dimension, that is, rhetorical and action based. Stance is conveyed, therefore, by taking a moral, affective, social, philosophical and political standpoint that leads to action. The commodian stance is thus our term for referring to a particular way of considering the position of the researcher in the relationship between science and society.