The one and only study shows handler bias to be highly significant... Therefore until further, studies handler bias cannot be ruled out...
You are simply quoting opinion when you say handler bias is not significant... You are, quoting opinion when you say the alerts are reliable... It's all opinion.... Suddenly you accept opinion... How convenient
Do you ever conduct your own practical experiments?
My dog has alerted to two cadavers to date.
The first one I knew about in advance, when signs of life were in evidence, i.e. not dead. The dog did not alert then. The day after, Gonçalo alerted, and sure enough, life had expired.
Perhaps a week or so later, Gonçalo was at the wire-mesh fence to our neighbour. He was barking animatedly. I went over to see if he was barking at one of the neighbours' many cats.
When I peered through the fence, lo and behold, no cat, but another cadaver.
You need to come up with more than a single scientific study. My practical experiments suggest you need to approach such studies with extreme caution.
