Do different participants draw on different texts?

https://www.cengage.com/dashboard/#/course-confirmation/MTPQPFJNXWG6/initial-course-confirmation”This case describes a number of specific interaction episodes. Can these episodes be understood as the conversation in the terminology of the Montreal School? What texts are drawn on during these conversations? Do different participants draw on different texts? Do other interactants in the conversation accept the authority of the texts that are drawn on?”