by Claude Opus 5.5
What is the difference between “we don’t believe you” and “we can’t prove it”?
When a prosecutor decides not to bring charges after someone reports a sexual assault, the person who reported it often hears that decision as a message: we don’t believe you. In the case behind these seminars, the district attorney originally declined to charge anyone, pointing to a signed statement in which the complainant had described the conduct as consensual. Many people heard that decision as disbelief. But legal decisions not to charge are usually meant to say something different: we can’t prove it. Understanding the difference between these two statements matters for complainants, for the accused and for everyone trying to make sense of cases like this.
Two different claims
“We don’t believe you” is a claim about what someone thinks is true. It says: I think your account is false, or at least I think it is probably false.
“We can’t prove it” is a claim about what can be shown to others. It says: whatever I think, the evidence available is not strong enough to convince a court, according to the rules a court must follow.
These can come apart. A detective might privately believe a complainant completely and still conclude that the case cannot be proved. A juror might think a defendant probably did it and still vote to acquit, because “probably” is not “beyond reasonable doubt”. In fact, the criminal justice system is designed so that this happens. The standard of proof is deliberately very high, because convicting an innocent person is considered worse than letting a guilty one go free.
Why the standard is so high
In criminal cases, the prosecution must prove guilt beyond reasonable doubt. That means the jury must be sure. The reason for this high bar is that a conviction can take away someone’s liberty and mark them for life. If the bar were lower, more innocent people would be convicted.
Sexual offences are often especially hard to prove to this standard. They frequently happen in private, without independent witnesses. There may be no physical evidence, or evidence that shows sexual contact but not whether there was consent. Memory may be affected by alcohol, drugs or trauma. In many cases it comes down to one person’s word against another’s, and the law requires more than that the jury finds one person slightly more believable.
So when a prosecutor says there is “insufficient evidence”, the honest meaning is often: we cannot meet the standard the law requires. It is not necessarily a judgement that the complainant is lying.
Why it can still feel like disbelief
Even if “we can’t prove it” is what officials mean, it is easy to see why complainants hear “we don’t believe you”.
First, the practical effect is the same. The accused faces no criminal consequence, and the complainant’s account is not officially affirmed.
Second, explanations are often brief or absent. If a complainant is told only that the case will not proceed, she has to guess at the reasons, and disbelief may seem the most obvious one.
Third, sometimes disbelief really is part of the reason. Prosecutors judge whether a jury is likely to believe a witness. If they think a jury would not believe her, they may decline to charge. That is still technically a judgement about proof, but it can be shaped by assumptions about how “credible” victims behave, which may be unfair. Research suggests that some of these assumptions, for example that a real victim would report immediately or would have a perfectly consistent account, do not reflect how people actually respond to trauma.
Fourth, the wider public often hears it as disbelief too, and may treat the accused as cleared and the complainant as discredited.
What the distinction means for the accused
The distinction cuts both ways. “We can’t prove it” is not the same as “he did it”. If a prosecutor declines to charge, the accused remains innocent in law. People who say “they just couldn’t prove it” as though that settles guilt are making the opposite mistake. A decision not to charge leaves the question open: it means the legal system cannot reach a confident conclusion, not that it has reached one in either direction.
Why it matters
Getting this distinction right could change how cases are handled and discussed. Prosecutors could explain decisions more carefully, making clear when they are judging the evidence rather than the person. Complainants could be told that a decision not to charge does not mean they were disbelieved, if that is true. And public discussion could resist turning every decision not to charge into either “she lied” or “he got away with it”.
It also matters for other institutions. Universities, employers and others use lower standards of proof than criminal courts. That is why, in the Cornell case, a university panel could find students responsible even though no criminal charges had been brought. The university was not contradicting the prosecutor: it was answering a different question using a different standard.
Questions for discussion
If you reported something and were told “we can’t prove it”, how would you want it explained to you? Is it possible for someone to be both believed and not protected by the law? Should the standard of proof for sexual offences be lower than for other crimes, or would that be unfair? And how should the rest of us talk about cases where no one was charged?