[EM] Is "Inverse Nanson" better than standard Nanson?

[Markus Schulze]

Dear participants,

due to Condorcet, a "proposition" is a statement of the
form: "X is better than Y." An "opinion" is a set of
n*(n-1)/2 propositions (one for each pair of candidates).
A "possible opinion" is a set of n*(n-1)/2 propositions
(one for each pair of candidates) that is compatible to
a ranking. An "impossible opinion" is a set of n*(n-1)/2
propositions (one for each pair of candidates) that is
incompatible to every ranking.

Due to Condorcet, when one "eliminates" a proposition of
an opinion then one still has an opinion. Therefore, it
is clear that "eliminating" can only mean "inverting".

Markus Schulze