You get scored based on the number of mages you correctly accuse; and a valid accusation requires you to specify at least one kind of illegal healing they’ve done. (So if you’ve already got Exampellius the Explanatory for healing Chucklepox, you don’t get anything extra for identifying that he’s also healed several cases of Rumblepox.)
The question is ambiguous. Is an “accusation” “this mage has illegally healed” or “this mage has done this specific illegal healing”?
You get scored based on the number of mages you correctly accuse; and a valid accusation requires you to specify at least one kind of illegal healing they’ve done. (So if you’ve already got Exampellius the Explanatory for healing Chucklepox, you don’t get anything extra for identifying that he’s also healed several cases of Rumblepox.)