Tags / 2 quotes from 2 sources
#possible-worlds
Human, All Too Human: A Book For Free Spirits
The world is neither good nor bad; men are the ultimate root of these ideas
What earthly reason could anyone have for being an optimist unless he had a god to defend who must have created the best of all possible worlds, since he is himself all goodness and perfection?—but what thinking man has now any need for the hypothesis that there is a god?—There…
Ontologies And Knowledge Bases: Towards A Terminological Clarification
Ontological theory
An ontological theory contains formulas which are considered to be always true (and therefore sharable among multiple agents), independently of particular states of affairs. Formally, we can say that such formulas must be true in every possible world. [...] an ontological…