Things and events can be possible {possibility} in different ways and can be possible in some ways but not in others. If something is conceivable to reason, it is possible.
concept
Things and events can have no internal contradictions {conceptual possibility}.
epistemology
Empirical facts can allow things and events {epistemological possibility}.
logic
Perhaps, thing and event negation is contradictory {logical possibility}.
metaphysics
Perhaps, things and events do not contradict physical facts {metaphysical possibility}. Metaphysical possibility derives from metaphysical necessity.
nomology
Science laws can allow things and events {nomological possibility}.
physics
Imaginable situations can be consistent with physical laws {nomical possibility}.
proposition
Propositions can have possibility {problematic proposition}.
time
The past can allow things and events {temporal possibility}.
Things can have potential to happen or can be impossible {entelechy, epistemology}. Possibility is separate from whether something actually happened, will happen, or had to happen. Humans can distinguish what is merely possible and what is required.
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Date Modified: 2022.0225