1) Logician 2) Logistician 
A dialectician is a philosopher who views the world in terms of complementary opposites and the interactions thereof. In popular usage, the central feature of dialectic is the concept of `thesis, antithesis, synthesis` - when an idea or phenomenon (thesis) arises, it carries within itself the seed of its opposite (antithesis), and the interplay .....
• (n.) One versed in dialectics; a logician; a reasoner.
Di`a·lec·ti'cian noun [ Confer French dialecticien .] One versed in dialectics; a logician; a reasoner. 
[n] - a logician skilled in dialectic
noun a logician skilled in dialectic
a person skilled in dialectic; logician. · a dialectologist.