Aristotle BC - BC perfected a form of deductive argument called the syllogism. Aufhebung or Sublation Aristotle's logic is concerned with separate, discrete self- identities in a deductive pattern.
But it also rests on the assumption that the Forms—the universal, rational concepts or ideas of reason itself—are static and fixed, and so cannot grasp the messiness within the imperfect world. Being thus sublates itself because the one-sidedness of its moment of understanding undermines that determination and leads to the definition it has in the dialectical moment.
As little as antithesis without synthesis, or synthesis without antithesis, is possible; just as little possible are both without thesis. As he says of the move from the contradiction between self and not-self to the synthetic concept of divisibility, there can be no further question as to the possibility of this [synthesis], nor can any ground for it be given; it is absolutely possible, and we are entitled to it without further grounds of any kind.
Moreover, because the process develops necessarily and comprehensively through each concept, form or determination, there are no determinations that are left out of the process.
We can think of Being here as a concept of pure presence. In some cases, a new, higher-level concept is introduced that stops the spurious infinity by grasping the whole, back-and-forth process.
The logic begins with the simple and immediate concept of pure Being, which is said to illustrate the moment of the understanding. The synthesis solves the conflict between the thesis and antithesis by reconciling their common truths, and forming a new proposition.