Former lobbyist Frank Dunlop has denied that he invented a system of corruption in Dublin County Council.
Mr Dunlop was responding at the Flood Tribunal to questions from Seamus Ó'Tuathail, counsel for Senator Don Lydon.
Mr Ó Tuathail said it was Mr Dunlop who introduced money to an otherwise normal system for dealing with planning matters in a local authority. He suggested it should be called 'the Dunlop system'.
Mr Dunlop said anyone who suggested there would have been no corruption if he had not existed was either a knave or a fool.
Mr Ó Tuathail suggested that without Mr Dunlop's money, there would have been no takers. In reply Mr Dunlop said there still would have been plenty of people asking.
Mr Dunlop also disagreed that the Fianna Fáil party did not operate a whip system in relation to planning matters.
He said that while that may have been the theory, it was clear there was a whip system in place.