Continuing its long-running debate on the subject Monday, members of Congress argued the merits of Canadian power trio Rush. ''The philosopher and the plowman, each must play his part'?' asked House Majority Leader Dick Armey (R-TX). 'C'mon. Neil Peart must be the most pretentious lyricist in arena-rock history. Gentlemen, forget these bloated, overrated '70s dinosaurs.' Countered longtime Rush loyalist Rep. Peter DeFazio (D-OR): 'Keep talking, man, the tunes say it all: 'Passage To Bangkok'? 'By-Tor And The Snow Dog'? That part in 'Red Barchetta' where [Rush bassist/vocalist] Geddy [Lee] sings about the gleaming alloy aircar shooting toward him two lanes wide? Look me in the eye and tell me that doesn't rock, motherfucker!' The deliberations are expected to continue throughout the week. 