I find rather interesting that, except for the above comment, most replies here have been to stay out of it, mind your own business, the cheater will get caught eventually, etc. Most students here, I dare say, go to institutions where there is an honor code where no only cheating is prohibited but the duty to directly report any instances of cheating or the indirect duty of upholding the code for the good of the community which implies the same. In other words, not reporting cheating that you have first hand knowledge of is as much of a violation of honor code as the cheating itself. Rarely, of course is this enforced. And students ask why should they put in time and effort, risk criticism of fellow students, and generally put themselves out there for such a thing?
At some point in your medical training (and careers for that matter) will either make a mistake or see someone make a mistake that will endanger a patient. It may be a fellow student, or it could be a resident above you. Or even an attending. How do you deal with the situation? Lets assume for a moment the mistake never gets reported and patient dies. Is the person who saw the error and did not report it as responsible for the patient death as the one who actually made the mistake.
I assure you all of you will be in some situation where a dilemma like this will be in your future. How will you deal with it? In this thread it is simply cheating on a test. on paper so do speak. What about cheating on a medical record? Where that might lead down the road when you should have said something? Something to think about as you go on in your medical careers