Belief node
Target belief B0 / basic belief
Gettier "luck" edge
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Epistemology's classical analysis says knowledge is justified true belief — but every justification seems to need a justification of its own, an infinite regress. This simulator renders that chain as a living 3D graph you can resolve three different ways: foundationalism (the chain terminates in a self-justifying basic belief), coherentism (beliefs mutually support one another in a closed web with no starting point), or infinitism (the chain is allowed to run on without end). Set the chain length, animate a pulse of justificatory support flowing toward the target belief, and flip on Gettier's famous "lucky accident" to watch a belief that is both true and justified nonetheless fail to count as knowledge — the counterexample that broke the classical JTB analysis in 1963 and is still debated today.