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Libertarians recognize the difference between adults and children, as well as differences between normal adults and adults who are insane or mentally hindered or retarded.

Tom G. Palmer (2009). “Realizing Freedom: Libertarian Theory, History, and Practice”, p.35, Cato Institute
Libertarians recognize the difference between adults and children, as well as differences between normal adults and adults who are insane or mentally hindered or retarded.