Hegel speculation/speculative

For Hegel, truth is historical. If it is historical then it is flexible, shape-shifting and index-linked to developments across time.42 Truth is like the note that has worked free of its metallic equal, invading the realm of the symbolic. Hegel s emphasis shifts to the concept of illusory being or semblance, in German, Schein, which is also the word for banknote. Regimes fix values in coin and note, but the promise of eternal security is undermined by inflation, devaluation and speculation. Its material form - its natural aspects - also continue to assert themselves in wear and tear. 

R. G. McRae Philosophy and the Absolute. The Modes of Hegel s Speculation. 1985... 

For example, throughout the history of the physical sciences, the unity of matter underlies material diversity. However, this process of rationalisation comes to a (temporary ) stop when it encounters irrationals , for example the variety of chemical elements, or when material properties cannot be reduced to geometrical features. The existence of the irrational is encountered at every stage. He opposed a priori speculations concerning science. The deductive efforts of Kant, Hegel, Schelling fail because reason cannot draw from itself the diversity of nature [1908, 399]. Furthermore, against Kant, chemistry unquestionably presents all the characteristics of a distinct science [1921, 167]. 

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