Theory Is Not Merely a Set of Propositions or Statements; A Theoretical System Cannot Be Self-Contained
Recently I’ve talked about the relevant issues twice: (studying Wittgenstein, without any tidying up, just pasting the chat log~) “Is theory a set of propositions? Agree or not?”—— A proposition, a declarative sentence, in itself has no meaning if you do not know the meaning of each word in it, but the meaning of words cannot be given entirely within a set of propositions; ultimately, the meaning of words still has to involve referential definitions, so it is bound to draw in practical activity and the question of the way we contemplate the world. “Can a system close itself off?”—— A system cannot close itself off A theoretical system is…
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