Also, I'm going to reply to you again because I mostly talk about false alerts, but I want to emphasize that it can go the other way too. All of my dogs' alerts except one (which to be fair was a clear false alert and on a very recently certified dog in a very unusual situation) were actually eventually backed up by definite forensic evidence, although in a few situations it has taken years (water recoveries suck). But we have erred in the other direction. I've erroneously called my dogs off scent because I thought they were just distracted, or skipped over areas I should have searched just because I was tired or got tunnel vision or whatever.

That does kind of come up in this sub, too, when people wonder "well, what's the harm in running cadaver dogs over this scenario with a lot of factors that could maybe cause a dog to not alert?" A lot of LEOs without K9 handlers fall into the same trap of assuming that dogs are infallible, so it actually could hurt because people interpret "no alert" as "nothing's there," when again, it's really complex.