„At several places in his writings Wittgenstein lays down principle (**a**) in the sense of an obligation of language and logic to look after themselves: "Language (logic) must look after itself (speak for itself)." This principle is, among other things, a position on the problem of the foundation of logic, arrived at through several demarcations: first against the empiricist foundation of logic – logical propositions accordingly "cannot be refuted by experience" (TLP 6.1222) – further against a psychologistic foundation, against evidence, against the "self-evidence, which Russell talked about so much" (TLP 5.4731): this "can become dispensable in logic only because language itself prevents every logical mistake." (ibid.) These demarcations exclude any recourse to facts of experience and avoid an infinite regress in this respect. Consequently, the principle of autarky means, in the negative sense, independence from any kind of experience and, in the positive sense, something like *self-foundation*; "It is always possible to construe logic in such a way that every proposition is its own proof." (TLP 6.1265) With regard to its foundation, logic is autarkic, which means a priori and circular."