Smart answer:

Your search for What is the second incompleteness theorem returned the following results:

the system's own consistency

The second incompleteness theorem, an extension of the first, shows that the system cannot demonstrate the system's own consistency.

no sufficiently strong, consistent, effective axiom system for arithmetic

The second incompleteness theorem states that no sufficiently strong, consistent, effective axiom system for arithmetic can prove The second incompleteness theorem's own consistency, which has been interpreted to show that Hilbert's program cannot be completed.

for theories of sufficient strength

Gödel's second incompleteness theorem is often interpreted as demonstrating that finitistic consistency proofs are impossible for theories of sufficient strength.

Source:

to canonically define a formula Cons(F) expressing the consistency of F.

For each formal system F containing basic arithmetic, Second incompleteness theorem is possible to canonically define a formula Cons(F) expressing the consistency of F.

Source:

as making the problem impossible

The second incompleteness theorem, in particular, is often viewed as making the problem impossible.

by showing that S T {\displaystyle S_{T}} can be chosen so that S T expresses the consistency of T {\displaystyle T} itself

The second incompleteness theorem extends this result by showing that S T {\displaystyle S_{T}} can be chosen so that S T expresses the consistency of T {\displaystyle T} itself.

Source:

a consistent formalized system which contains elementary arithmetic

Second Incompleteness Theorem: 'Assume F is a consistent formalized system which contains elementary arithmetic.

Source:

an extension of the first

The second incompleteness theorem, an extension of the first, shows that the system cannot demonstrate the system's own consistency.

us

Second Incompleteness Theorem tells us that we’ll never receive that reassurance.

a problem for the idea of self-modifying AI

the second incompleteness theorem's especially a problem for the idea of self-modifying AI.

to canonically define a formula Cons(F) expressing the consistency of

For each formal system F containing basic arithmetic, Second incompleteness theorem is possible to canonically define a formula Cons(F) expressing the consistency of

Source:

to consistency

The fact that the second incompleteness theorem refers to consistency is important for several applications, both philosophical and mathematical.

in Words of One Syllable

Second Incompleteness Theorem Explained in Words of One Syllable.

Source:

all true mathematical propositions –

But the second Incompleteness Theorem much more directly challenges all true mathematical propositions – indeed many have felt that all true mathematical propositions directly shows Hilbert's Program to be unachievable.

Source: