Is it for sure that 99, exactly 99 out of 100 are going to be accurate, and that one out of 100 is going to be inaccurate? Well that's definitely a likely possibility, but it's also possible you get a little lucky and all 100 are accurate, or you get a little unlucky, and that 98 are accurate, and that two are inaccurate. And actually I calculated the probabilities ahead of time, and the goal of this video isn't to go into the probability and combinatorics of it, but if you're curious about it, there's a lot of good videos on probability and combinatorics on Khan Academy. But I calculated it ahead of time, and the probability, if you have something that has a 99% chance of being accurate, and you apply it 100 times, the probability that it is accurate, that it is accurate 100 out of the 100 times, is approximately equal to, approximately equal to 36.6%. I rounded to the nearest tenth of a percent. So it's a little better than a third chance that you'll actually get all of, all of the people are going to get an accurate result, even though for any one of them, there's a 99% chance that it's accurate. Now we could keep going.