Knowledge is independent of the knower's mental states.

Knowledge is dependent on the knower's mental states.

Knowledge is a social phenomenon.

Knowledge is a product of evolution.

A person knows that the Earth is round because they have seen it from space.

A person knows that 2 + 2 = 4 because they have memorized the multiplication table.

A person knows that it is wrong to steal because they have been taught that it is wrong.

A person knows that the sky is blue because they have seen it with their own eyes.

Externalism is too vague and does not provide a clear account of what knowledge is.

Externalism is incompatible with the idea that knowledge is a mental state.

Externalism is circular because it relies on the concept of knowledge to define knowledge.

Externalism is too narrow and does not allow for the possibility of non-propositional knowledge.

Externalism does not claim that knowledge is independent of the knower's mental states, but only that it is not solely determined by them.

Externalism is compatible with the idea that knowledge is a mental state, but only if we understand mental states in a broad sense.

Externalism is compatible with the idea that knowledge is a mental state, but only if we allow for the possibility of non-propositional knowledge.

Externalism is compatible with the idea that knowledge is a mental state, but only if we allow for the possibility of external mental states.

Externalism shows that knowledge is not as reliable as we thought.

Externalism shows that knowledge is more reliable than we thought.

Externalism shows that knowledge is not possible.

Externalism shows that knowledge is a social phenomenon.