ATLANTA (AP) — The Supreme Court has refused to halt the execution of a Georgia man whose lawyers say he is ineligible to be executed because he is intellectually disabled. State and federal courts had already rejected his filings this time around, and the State Board of Pardons and Paroles —the only entity authorized to commute his sentence to life in prison — denied him clemency Tuesday. Hill's lawyers argued that Georgia's standard is unconstitutional because mental diagnoses are subject to a degree of uncertainty that is virtually impossible to overcome. Included with the clemency application Hill's lawyers submitted to the parole board were letters from former President Jimmy Carter and his wife and groups that advocate for those with disabilities. "In light of the undisputed evidence that Mr.