The master holds the disciple’s head underwater for a long, long time; gradually the bubbles become fewer; at the last moment, the master pulls the disciple out and revives him: when you have craved truth as you crave air, then you will know what truth is.
Under ancient Jewish law, if a suspect on trial was unanimously found guilty by all judges, then the suspect was acquitted. This reasoning sounds counterintuitive, but the legislators of the time had noticed that unanimous agreement often indicates the presence of systemic error in the judicial process, even if the exact nature of the error is yet to be discovered. They intuitively reasoned that when something seems too good to be true, most likely a mistake was made.
[A] team of researchers has further investigated this idea, which they call the “paradox of unanimity.” […] The researchers demonstrated the paradox in the case of a modern-day police line-up, in which witnesses try to identify the suspect out of a line-up of several people. The researchers showed that, as the group of unanimously agreeing witnesses increases, the chance of them being correct decreases until it is no better than a random guess.