What would count as evidence against it? What would have to be true for a fair person to walk away from it?

One proven contradiction in the Qur'an (Qur'an 4:82). One matched chapter (Qur'an 2:23). One failed prophecy. Islam names its own tests and stakes itself on them — and holds that after fourteen centuries, all three still stand unmet.

Because its authority is evidential, atheism is refutable in principle, and its thinkers say so. Russell, asked what he would tell God if they met, answered 'not enough evidence' — implying sufficient evidence would have changed his mind; commonly named convincers include a specific fulfilled prophecy, a verified miracle under controlled conditions, or prayer effects confirmed in rigorous trials. An honest complication: some philosophers note that almost any observation could be given a natural explanation, so in practice the dispute may turn on which explanation is simpler rather than on one decisive test — a limit atheist writers such as Oppy acknowledge. Still, the stated standard stands: show the evidence, and the position must move.

Evidence is the only thing that could end the suspension, and agnostics can name it. Toward belief: a public, checkable demonstration — Russell, asked what he would say if he met God, reportedly answered 'Not enough evidence, God, not enough evidence,' implying that sufficient evidence would have compelled him. Toward denial: a proof that the concept of God is contradictory, or a complete naturalistic closure of every gap. Strong agnostics concede that almost nothing could move them either way — and the honest ones admit this makes their own position the hardest of all to test.

Christianity states its own test: Paul wrote that 'if Christ has not been raised, our preaching is useless and so is your faith' (1 Corinthians 15:14) — so showing that Jesus stayed dead, or never lived, would end the claim. Philosophers add others: a proof that the concept of God is incoherent, or that evil is logically incompatible with him. Since the resurrection cannot now be replayed, critics note the test is historical rather than experimental; believers answer that a faith staking everything on one public, investigable event is more falsifiable than most.

The tradition names some tests of its own: a prophecy that fails disqualifies the prophet, and Maimonides granted that a demonstrated eternal universe would force him to reinterpret Scripture — evidence is allowed to matter. By its own logic, proof that the Sinai tradition was fabricated, or the disappearance of the Jewish people whose endurance the covenant promises, would count against it. Beyond that, many Jews treat the covenant as a relationship of trust that argument alone cannot overturn — an honest report must say the core is not treated as falsifiable.

The tradition names its own test: the Kalama Sutta and the «come and see» formula stake the teaching on results, so a fair person could walk away if sustained, well-guided practice failed to reduce craving and suffering — that core is genuinely testable. Karma and rebirth are harder: the canon says only awakened vision confirms them, which places them beyond ordinary checking, and modernists like Stephen Batchelor therefore bracket them as inherited metaphysics. Evidence that mind is wholly dependent on the brain would strike at rebirth directly; traditionalists reply that no such proof exists, and that the practice stands either way.

Few Hindu thinkers name a disconfirming test, and the core claims are structured to evade one: karma's ledger is invisible, rebirth erases memory, and Advaita locates final proof in an experience only the realized attain. Fair pressure points do exist — if consciousness were fully explained as brain process the atman claim would fail, and rigorously documented past-life memory would conversely count in its favor. In honest summary: the tradition treats realization, not falsification, as the test, and by scientific standards that leaves its central claims unfalsifiable.

Sikh thinkers propose no formal test: the faith rests on the Gurus' witness and the lived experience of the Name, and most treat it as trust confirmed by practice rather than a hypothesis to falsify. By its own logic, the case would weaken if the hymns were shown not to be the Gurus' own words, or if lives of remembrance and service showed none of the promised transformation; and a fair person persuaded that the one God of the Mul Mantar does not exist would have grounds to walk away. That is the honest report: Sikhism offers testimony and fruits, not proofs.

Its advocates treat it as an empirical wager, and say so: if states with neutral institutions systematically produced worse religious peace, less freedom, and more persecution than confessional states, the case for secularism would fail. It would also count against it if fair neutral institutions proved impossible in practice — if every secular state inevitably slid into either religious capture or anti-religious coercion. Since the claim is political rather than metaphysical, secularists accept that history, not faith, is the judge.

Humanists offer real answers: firm evidence that a god exists and commands otherwise, or solid evidence that humans cannot live morally or make moral progress without religion — either would break its case. Kurtz framed humanist positions as revisable hypotheses, open to correction in principle. The honest report: its core commitment — that human dignity is worth everything — is a value, not a prediction, and fair humanists concede it is argued for and chosen rather than proven.

Because its case is largely empirical, liberals can state a test: if liberal orders systematically produced less freedom, peace, and flourishing than real alternatives, the case would fail — Mill built this fallibilism in, holding every doctrine open to refutation. Critics such as Deneen argue the returns are already in: liberal societies are dissolving the families and communities they depend on. Liberals reply that the comparative record still favors them decisively. One honest caveat: the bedrock conviction that each person's liberty matters equally is a moral commitment, and many liberals concede that no data could refute that value itself.

Its specific claims are testable, and feminists cite the tests already run: had equal education and suffrage produced the social collapse opponents predicted, or had women failed in the opened professions, the case would have fallen — the opposite happened. What would count against it now is openly debated: if remaining gaps persisted unchanged under fully equal conditions, or if innate differences were shown to explain them, particular feminist claims would fail — this is the live argument with critics such as Pinker over sex-difference research. The bedrock claim — that women and men are equal in dignity — is a moral commitment, not a prediction, and honest feminists grant that data alone cannot falsify it.

As a loyalty, it rarely states a test for itself, and honest observers say most nationalists treat it as beyond disproof. Parts of it are testable, though: if stable democracy and generous welfare flourished just as well in post-national units — the European Union is the running experiment — the solidarity argument would weaken; and if national identities dissolved under globalization, its picture of durable nations would fail. Mill's classic claim, that free institutions need a shared nationality, is checked against multinational democracies like Switzerland and India — a debate still open. A fair person could walk away if belonging proved deliverable without nations, at no cost to freedom or solidarity.