Policy Adviser: Freedom of speech is not only a basic human right; it is also the only rational policy for this government to adopt. When ideas are openly aired, good ideas flourish, silly proposals are easily recognized as such, and dangerous ideas can be responded to by rational argument. Nothing is ever gained by forcing citizens to disseminate their thoughts in secret. The policy adviser's method of persuasion, in recommending a policy of free speech to the government, is best described by which one of the following? ['a warning about the difficulty of suppressing the truth', 'a circular justification of the idea of free speech as an idea that flourishes when free speech is allowed', 'advocating respect for basic rights of citizens for its own sake', 'a coupling of moral ideals with self-interest']