knockdown argument

18 LETTERS · STARTS WITH K

knockdown argument is a valid 18-letter word worth 34 points in Scrabble and 41 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

K5N1O1C3K5D2O1W4N1A1R1G2U1M3E1N1T1

5 + 1 + 1 + 3 + 5 + 2 + 1 + 4 + 1 + 0 + 1 + 1 + 2 + 1 + 3 + 1 + 1 + 1 =34 PTS

DOUBLE WORD → 68TRIPLE WORD → 102

MEANING

What does knockdown argument mean?