Full Idea
A person's voice may count either because her interests are involved, or because he reasoning and judgement can enlighten a discussion.
Gist of Idea
A person's voice may count because of their interests, or because of their good sense
Source
Amartya Sen (The Idea of Justice [2009], 04 'Diversity')
A Reaction
Good. Inarticulate people may have strong interests, and articulate and helpful people may be wholly disinterested. But people may have unworthy interests, and may be articulate but not sensible.
Book Reference
Sen, Amartya: 'The Idea of Justice' [Penguin 2010], p.108