But, as a former Italian president, Francesco Cossiga, has said, they are also causing unquestionable discomfort to a service that has helped to shield Italy from attack by Islamist terrorists.
The commitment of these athletes to the green and gold cause is unquestionable.
The killer's passionate devotion to the Southern cause was unquestionable, but his singular family history, and the years he spent contending with his older brother's greatness, presented other keys to his character.
The global importance of cancer is unquestionable, considered the second cause of death worldwide.
Sheriff Michael O'Grady, who pronounced sentence on Eaton in Edinburgh Sheriff's Court, called his own "sentencing powers … wholly inadequate" because of the possibility that Eaton "could have caused cancer patients unquestionable harm," reports BBC News.
"The evidence that cervical cancer causes deaths, however, is unquestionable.
When someone is shot with bullets, the cause of death is usually unquestionable.
Her faith and her duty to the cause of girls' education is unquestionable, her adoration for her father – her role model and comrade in arms – is moving and her pain at the violence carried out in the name of Islam palpable.
One of the causes of being blind to the unquestionable damage we have inflicted on the oceans over the past 30 years is "our failure to notice creeping environmental degradation".
The concept of existence identifies as basic and unquestionable the fact that something exists; to ask for a cause or explanation of there being something rather than nothing is to misunderstand the place of existence in the hierarchy of concepts.
As in Ms. Piper's case, his artistic authority remains unquestionable.
