There are no prima facie rules limiting the agenda of the conversation, or the identity of the participants, as long as each excluded person or group can justifiably show that they are relevantly affected by the proposed norm under question. In certain circumstances this would mean that citizens of a democratic community would have to enter into a practical discourse with noncitizens who may be residing in their countries, at their borders, or in neighboring communities if there are matters that affect them all. Ecology and environmental issues in general are a perfect example of such instances when the boundaries
of discourses keep expanding because the consequences of our actions expand
and affect increasingly more people.