As noted, Hegel located the heart of skepticism in the equipollence strategy. |
As a result of this equipollence, he finds himself suspending judgment, at least insofar as philosophical justifications for a view are concerned. |
Open scepticism rejects the demonstration of equipollence as itself dogmatic and emphasises the usefulness of refined elaborations of appearances. |
From here the step is not far to Dedekind's view that equipollence is a sufficient condition for equinumerosity. |
Obversion is discussed in several twelfth and early thirteenth century anonymous texts edited in De Rijk 1967, where it is seen as a type of equipollence. |