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Actual proofs will end up using own and inv, and none of the notions defined in ownership.v

No idea why these aren't resolved automatically, for unary predicates
they do not seem necesarry.

...unfortunately, that proof actually got longer because some automation no longer works

This way we can more easily state lemmas for concrete languages for
arbitrary global functors.

The proofs are neither short nor nice, but at least they compile
fast (4 sec for the whole file) and the statements look like
they would look like on paper.