1. It is highly conducive to the interests of the community that each individual should enjoy a liberty perfectly unlimited of expressing his sentiments.
2. Thus, to every man unbounded freedom of speech must always be, on the whole, advantageous to the state
i need to state wheter the premise is acceptable or unacceptable and provide the condition of the premise acceptability/unacceptability
For further reading, you might try one or more of these articles:
http://www.bing.com/search?q=acceptable%2Funacceptable+premises+in+philosophy&form=EDGNTC&qs=PF&cvid=f7392382afb348788cb1230e0f4f6c95&pq=acceptable%2Funacceptable+premises+in+philosophy&cc=US&setlang=en-US