e·ris·tic 
(ĭ-rĭstĭk) also e·ris·ti·cal (-tĭ-kəl)
(ĭ-rĭstĭk) also e·ris·ti·cal (-tĭ-kəl)adj.
Given to or characterized by disputatious, often specious argument.
n.
1. One given to disputation or argument.
2. The art or practice of disputation and polemics.
[Greek eristikos, from erizein, to wrangle, quarrel, from eris, erid-, strife.]