Lyotard shifted attention away from the content of free speech to the way certain topics restrict speech as a public good. Some things are unmentionable and undebatable, but not because they offend the sensibilities of the sheltered young. Some topics, such as claims that some human beings are by definition inferior to others, or illegal or unworthy of legal standing, are not open to debate because such people cannot debate them on the same terms.
When one person’s “free speech” is a dismissal of others’ humanity or a demand that others justify their humanity, the latter are either treated as non-participants in the debate or have their participation limited to defending their right to be there–which means they don’t truly have free speech themselves. Thus:
It has been regrettably easy for commentators to create a simple dichotomy between a younger generation’s oversensitivity and free speech as an absolute good that leads to the truth. We would do better to focus on a more sophisticated understanding, such as the one provided by Lyotard, of the necessary conditions for speech to be a common, public good. This requires the realization that in politics, the parameters of public speech must be continually redrawn to accommodate those who previously had no standing.