Shown to be false (8)
(Other definitions for debunked that I've seen before include "Showed to be false or incorrect" , "Cut down to size!" , "Showed up as false or exaggerated" , "ruined reputation?" , "Uncovered pretentious or false claims and ideas" .)
(Other definitions for belied that I've seen before include "Contradicted or disproved" , "Contradicted, negated" , "Failed to confirm, or gave false idea of" .)