(NEWSER) – When everyone agrees on something, you just might have a problem. That's what a new study to be published in Proceedings of the Royal Society A found, according to a press release.

Researchers from the University of Adelaide in Australia used mathematical probability to test three scenarios. Each time, they found that too much agreement weakened confidence in the result. In one scenario, for instance, 13 witnesses confirm the identity of a criminal suspect. "But getting a large group of unanimous witnesses in these circumstances is unlikely, according to the laws of probability. It's more likely the system itself is unreliable," researcher Derek Abbott says in the release.

Other scenarios that were tested included witnesses confirming the identification of an archaeological find and the reliability of a cryptographic system.

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