The dialectic, there is no resolution, no higher unity.

You are having an argument or  a discussion, you have a point of view so does the other person

you exchange your thoughts a dialectic takes place and operates by synthesising the exchange into a new third term that overcomes the oppositions, but this third term might be seen as a dead end, and insipid mono certainty that your differences have been ironed out you are giddy and 

 intoxicated by a certainty that through discussion you have reached a 'higher' plane yet everything that exists only becomes and never is.

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identity the sufficient condition for difference to exist and be thought. It is only in relation to the identical, as a function of the identical, that contradiction is the greatest difference. The intoxication and giddiness are feigned, the obscure is already clarified from the outset. Nothing shows this more than the insipid monocentrality of the circles in the Hegelian dialectic. (DR 263)

While offering a philosophical tool that sees difference at the heart of being, the process of the dialectic removes this affirmation as its most essential step.

The further consequence of this for Deleuze relates to the place of negation in Hegel's system. The dialectic, in its general movement, takes specific differences, differences-in-themselves, and negates their individual being, on the way to a "superior" unity. Deleuze argues in Difference and Repetition 

Beneath the platitude of the negative lies the world of 'disparateness'" (DR 267). There is no resolution of the differences-in-themselves into a higher unity that does not fundamentally misunderstand difference. 

oNE MUST DISENTANGLE ONESELF FROM of implicit circularity between premises and conclusions, origins and manifestations.
Thought  functions all the more effectively in silence.