How many people?

Logic Level 3

You are in a country where exist only two types of people: knights, that always tell the truth, and knaves, that always lie. You saw a circle of \(n\) people. All people in there made the statement below:

Both people next to me are knaves.

What is the smallest value of \(n\) in order to guarantee (not depend on luck) that the circle have 6 knights?

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