eristic

adjective

1. Also er·is·ti·cal. pertaining to controversy or disputation; controversial.

noun

2. a person who engages in disputation; controversialist.
3. the art of disputation.

adjective Also: eristical

1. of, relating, or given to controversy or logical disputation, esp for its own sake

noun

2. a person who engages in logical disputes; a controversialist
3. the art or practice of logical disputation, esp if specious