Internalism holds that the justification for a belief is determined solely by factors internal to the believer, such as their evidence and reasoning. This means that the truth or falsity of the belief is irrelevant to its justification.

The Gettier problem is a thought experiment that challenges the internalist account of justification. It presents a case where a person has a justified belief that is true, but their justification is not reliable. This shows that justification and truth are not always connected, which undermines the internalist position.

The lottery paradox is a thought experiment that challenges the externalist account of justification. It presents a case where a person has a justified belief that is true, but their justification is not reliable. This shows that justification and truth are not always connected, which undermines the externalist position.

The coherence theory of justification is a theory of justification that holds that a belief is justified if it is coherent with the believer's other beliefs. Internalists often appeal to the coherence theory to argue that justification is determined solely by factors internal to the believer.

The Münchhausen trilemma is a thought experiment that challenges the foundationalist account of justification. It presents three options for how to justify foundational beliefs: infinite regress, circular reasoning, or dogmatism. This shows that foundationalism is either impossible or unreliable, which undermines the internalist position.

The regress argument is a common objection to the coherence theory of justification. It argues that if a belief is justified only if it is coherent with the believer's other beliefs, then those other beliefs must also be justified. This leads to an infinite regress of justification, which is impossible.

Foundationalism is a theory of justification that holds that some beliefs are justified without being based on other beliefs. These foundational beliefs are typically taken to be self-evident or indubitable.

The social epistemology argument is a common argument for externalism. It argues that our knowledge and justification are often socially mediated. We rely on others for information, testimony, and evidence. This shows that justification can be determined by factors external to the believer.

The testimony argument is an argument that challenges the internalist account of justification. It argues that we can be justified in believing something based on the testimony of others, even if we do not have any independent evidence for it. This shows that justification can be determined by factors external to the believer.

The regress argument is a common objection to externalism. It argues that if justification can be determined by factors external to the believer, then those factors must also be justified. This leads to an infinite regress of justification, which is impossible.

The peer disagreement argument is an argument that challenges the internalist account of justification. It argues that we can be justified in believing something even if our peers disagree with us. This shows that justification can be determined by factors external to the believer.

The defeasibility argument is a common argument for reliabilism. It argues that a belief is justified if it is formed by a reliable process, even if it is later defeated by new evidence. This shows that justification can be determined by factors external to the believer.

The virtue theory of justification is a theory of justification that holds that a belief is justified if it is formed by a virtuous person. Virtuous people are those who are disposed to form true beliefs and avoid false beliefs.

The regress argument is a common objection to the virtue theory of justification. It argues that if a belief is justified because it is formed by a virtuous person, then the virtue of that person must also be justified. This leads to an infinite regress of justification, which is impossible.