Must obvious pseudoscience receive equal space?

No. Equal access to fair standards is not equal distribution. Evidence quality can justify lower prominence, provided the rule is explainable and correction remains possible.

Can endless contrarians exhaust every discussion?

Yes, so evidence thresholds, time limits, and rules against repetition are legitimate. Repeated claims without new evidence need not receive infinite replies, while the reasons for a decision remain reviewable.

Is restricting harassment the same as silencing an opinion?

No. Threats, targeted abuse, and persistent intrusion may be restricted while leaving room to express and criticise the underlying view in non-injurious ways.

On Liberty

Why even a wrong opinion deserves a hearing: Mill on fallibility and public testing

Refusing to hear an opinion can turn “I am sure it is wrong” into “I cannot be wrong”. Mill’s fallibility argument protects a route for testing, not equal amplification for every claim.

All silencing of discussion is an assumption of infallibility.On Liberty, Chapter II · Silencing discussion assumes infallibility

The direct answer: confidence that it is wrong is not a position of infallibility

Mill begins with the simplest reason: the suppressed opinion may be true. Those who silence it naturally deny that, but individuals, institutions, and majorities can misjudge. Closing discussion before others see the reasons does more than state a conclusion; it removes everyone else’s means of judging it.

Read the Chapter II passage. Fallibility does not mean there is no truth. It means present certainty does not turn anyone into a final authority.

A hearing is not belief or equal amplification

Keeping a route for testing does not require placing careful research beside unsupported rumour with equal prominence. People may demand evidence, correct falsehood, restrict harassment, and allocate scarce attention by quality.

The distinction is between rebuttal through reasons and suppression that prevents reasons from being examined. A claim may fail under public standards without a powerful actor simply declaring that nobody may ask again.

A minimum process for fair testing

State the claim in a form its advocate recognises. Ask what evidence supports it and what would disconfirm it. Seek primary material and the strongest counterexample. Apply the same standards to both sides. Then explain publicly why the claim is accepted, rejected, or left unsettled. Refuting only its weakest version tests a straw person.

Discussion may have stopping rules: evidence has been repeatedly checked, no new reason is offered, and a decision has a deadline. A route for future review does not require starting every action from zero.

Why majority agreement is insufficient by itself

A majority may have better evidence, or it may share the same sources, interests, and blind spots. Institutional expertise deserves weight but not immunity from questions. Credibility should change the starting weight of a claim, not abolish scrutiny.

Correction often becomes possible because someone preserves a path for evidence to reach public judgement. Minority status proves no truth; forbidding a minority to give reasons proves no majority truth.

The limit: from opinion to concrete injury

Mill’s defence of discussion is not a defence of threats, harassment, fraud, or expression functioning as part of imminent harmful action. Content, audience, place, timing, and foreseeable risk must be assessed separately; “wrong” cannot substitute for evidence of injury. For that transition, read when speech becomes part of an action.