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Onus of Proof Principle

Learn why the burden of proof stays with the accuser, why you can never prove a negative, and how to push back against media claims using sound legal logic.

Chris Farmer, Founder of Corporate Coach Group

“British law and clear logic say the burden of proof is on the accuser, because a person cannot prove a negative; when the press hints at fault, the smart move is not to hunt for proof of innocence but to insist that the claimant shows hard facts.”

Chris Farmer — Founder, Corporate Coach Group

Onus of Proof Principle

There is a principle of logic that says that the onus of proof is on the prosecution. The onus of proof is not on the accused.

The accused does not need to prove his/her innocence. The person who is making (or implying) an accusation, is the one who must prove their case.

Paula Radcliffe is suffering from implied allegations of misdeeds. Paula is making a tactical error, in that she is trying to prove her innocence. This is an error, both tactically and logically.

Logically it is an error, because you cannot prove a negative. Since, if nothing happened, then it leaves no clues. Only if something happened does it leave clues. You cannot prove that you didn't do something wrong.

For example, if I said to you, "I accuse you of being a shoplifter who has never been caught. Prove that you are not."

Then you would not be able to prove that you have not ever been a shoplifter. I could say that the absence of evidence of you shoplifting, merely goes to show how skilful you are at avoiding detection.

It is impossible to prove innocence. That is why, in our law courts, you don't have to prove yourself innocent. The prosecution has to prove you guilty, beyond all reasonable doubt.

In the press and on the TV, they break this rule and make assertions, which tantamount to allegations, that X is "Linked to drugs".

The implication is left unsupported and the victim, the athlete, then feels forced to come out and try to deny the allegation.

Paula tried to prove her innocence. But in the act of protesting her innocence, she unwittingly reinforces in the public consciousness, the connection between drugs and her name. Her denial then becomes more fodder for the press to print the following day, to comment on and to further fuel the speculation that she may have something to hide.

They say her denials do not prove her innocence and so that again implies guilt. This is unfair, unjust and illogical.

Those people who are the victims of such smears should invoke the 'onus of proof principle'.

They should not attempt to prove their innocence; which cannot be done. They should challenge their accusers to put up, or shut up.

They should assert their innocence without any attempt to prove it. They should threaten legal action against anyone who claims or suggests, without evidence, that they have committed wrong doing.

Paula, please don't play the press by their rules. Please don't try to prove your innocence - you are innocent until you have been proven guilty.

It is up to your accusers to prove you guilty; not for you to prove you're not guilty. Paula, please apply the onus of proof principle to your accusers.

Stay strong.

Burden of proof principle

The burden of proof principle is a rule in criminal law that fixes the duty to prove guilt on the accuser, not the accused. It keeps the presumption of innocence, blocks calls to prove a negative, and states that if the accuser lacks solid proof beyond reasonable doubt, the court must free the accused.

CG4D Definition

Context: Criminal law
Genus: Legal principle

  • Places duty to bring evidence on the party that alleges guilt
  • Gives the accused a standing presumption of innocence
  • Bars any demand that the accused prove a negative
  • Leads to acquittal if the accuser fails to meet the required proof level

Article Summary

British law and clear logic say the burden of proof is on the accuser, because a person cannot prove a negative; when the press hints at fault, the smart move is not to hunt for proof of innocence but to insist that the claimant shows hard facts.

Chris Farmer, Founder of Corporate Coach Group

Written by Chris Farmer

Founder & Lead Trainer, Corporate Coach Group

Chris Farmer is the founder of the Corporate Coach Group and has over 25 years experience designing and delivering leadership and management training across both the public and private sectors. His programmes are structured, practical and built around real-world performance. Read more about Chris and the story of how the Corporate Coach Group was founded.

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Key Statistics

Ministry of Justice data show that 79% of defendants tried in the Crown Court between April and June 2024 were found guilty or entered a guilty plea, underscoring the high evidential bar prosecutors must clear before conviction.

Ofcom’s 2024 News Consumption report finds that 64% of UK adults who use social media say they came across at least one false allegation about a public figure in the past 12 months.

Frequently Asked Questions

Common questions about this topic

It places the legal burden on the accuser to prove guilt beyond reasonable doubt; the accused remains presumed innocent.
If nothing happened, no evidence exists, so you cannot supply proof that an event never occurred.
No. British courts put the burden of proof on the prosecution; defendants need only challenge the evidence.
Headlines hint at wrongdoing without evidence, pushing the target to defend the void, which fuels further speculation.
Assert innocence, demand that the accuser present facts, and consider legal action if they cannot back the allegation.
Repeated denials can link your name with the claim in public minds, so shift the onus of proof to the source.
Ask for clear, verifiable evidence, remind them of the legal burden, and be ready to sue for defamation if none appears.

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