Lets take a look at the implications of using this standard to convict someone, even if jail time isn't involved:
We have a video:
Person A uses a computer to do an assignment. They finish it and print it out. They log off, person B sits down. They recover the file, put their own name on it and print it out, then have person C do likewise.
The teacher gets three identical papers.
From looking at the video it's clear that A had no part of the impropriety but B & C are in cahoots. Unfortunately, this happened on a day with a school spirit activity going on, all three were wearing clown makeup so there's no way to figure out who is who.
What do we do?
Expel all three cheaters.
Simple statistics shows that there's a 2/3 chance they cheated. That's greater than 50%, you have to rule against them.
We have a video:
Person A uses a computer to do an assignment. They finish it and print it out. They log off, person B sits down. They recover the file, put their own name on it and print it out, then have person C do likewise.
The teacher gets three identical papers.
From looking at the video it's clear that A had no part of the impropriety but B & C are in cahoots. Unfortunately, this happened on a day with a school spirit activity going on, all three were wearing clown makeup so there's no way to figure out who is who.
What do we do?
Expel all three cheaters.
Simple statistics shows that there's a 2/3 chance they cheated. That's greater than 50%, you have to rule against them.