While I'd love it if we could do real-time verification of finishers, the fact of the matter is that the finish line volunteers have no reliable way of telling if somebody got to the summit first, if they didn't cut the switchbacks on the way up or down, or if they started at 7am vs 5am. It is entirely possible that somebody could start with the crowd, peel off the chips from their bib before noname, stop along the course, take a nap (lets not make it too obvious) and then jog down to the finish. Upon initial inspection it would look like they just had a bad chip. It happens.
Now that said, that results crew will catch this and pull them from the final results. If their chip was read at the summit and and the other split points and the data all looks right then it is easy to verify that they did in fact complete the course. But if they see a finish time and no corresponding summit time (or any other split) then they have to go digging through the two backup systems before they can DQ the runner. This takes time, especially if the summit internet link is down (it is down more than it is up) and we are waiting for the results to get down to us.
If you look at the the in-progress list, there are 10 folks who are marked as DQ. They have start times and other splits and even finish times. In some cases, they may have walked next to the finish mat and not intentionally over it (it will read 3-4' on either side). In others cases they may have gone over it so they could get to the med tent. In each case, they are not on the final results page index.
If they did go through, odds are that the volunteer handed them a medal. Yes, they can then go and tell all of their friends of their epic trip up and down the hill if they want. But if any of them them goes to look up the results then they will have some explaining to do when a big DNF is listed next to their name. So odds are they may have accepted one when it was given to them, but it will never see the light of day again.
All of that said, if you look at the final results, everybody listed has a full set of splits for all of the uphill segments. There are a few missing splits on the downhill segments, which is to be expected and in line with what we have seen in the past. But in then end, we are reasonably confident that if a person's name is on that list that they did in fact complete the race.