A claim is a statement of controversy that forms the central point or thesis for an argument. Effective claims are phrased as statements, are specific, and promote debate on both sides of an issue. There are three main types of claims: claims of fact which assert something exists or occurred, claims of value which make qualitative judgments, and claims of policy which assert something should or should not be done. Claims can be debated in various environments like scholarly, religious, political, business, legal, educational, and social debates.