Logical atomism carries some metaphysics with it, though its focus be on logic and epistemology. Logical atomism, in some ways different from Wittgenstein's, was espoused in those days also by Bertrand Russell. Tautologies do not tell us that things are actually one way rather than some possible other way. An authentic proposition, for Wittgenstein, is a picture or representation of a possible fact or state of affairs in the world. In Wittgenstein's sense, propositions are not philosophical.
Propositions belong to science or to everyday intelligence.
Russell concurred with much of the preceding during this century's late teens and early twenties. He agreed that propositions are pictures of reality and that elementary propositions, reflecting atomic facts, are logically independent of one another. He was persuaded by Wittgenstein that the propositions of logic and pure mathematics were simply tautologies. Russell held with Wittgenstein that a proposition can represent a fact because the proposition is made of words signifying objects and their conditions. Perception falls within knowledge by acquaintance.