There's a big difference between always blowing a whistle and actual foul play
The Disclosures Tribunal still has a long way to go. Already, however, Justice Peter Charleton has done the State some considerable service.
He has reminded us that putting the magic word 'whistleblower' in front of somebody's name does not automatically mean they are telling the truth - and each case of alleged corruption has to be judged strictly on its own merits.
Charleton's 97-page interim report about the case of Garda Keith Harrison certainly pulls no punches. Instead, it tears Harrison's testimony to shreds, using words such as "nonsense", "astonishing" and "tailoring his evidence to suit whatever suits his purpose at the time".