logical relation

NOUN
16 LETTERS · STARTS WITH L

logical relation is a valid 16-letter word worth 18 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
L1O1G2I1C3A1L1R1E1L1A1T1I1O1N1
1 + 1 + 2 + 1 + 3 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =18 PTS
DOUBLE WORD → 36TRIPLE WORD → 54
MEANING

What does logical relation mean?