The fact is that there is nothing inherent in physics that prevents the construction of an LRL device.
Especially when you have the advantage of fabricating your own physics, as LRL makers do. Actually, "construction" of an LRL device is so easy a 5-year-old can do it, as apparent by some of the manufactured LRLs I've obtained. Getting it to work is the Really Tough Part.
All of them? How can you know about all possible designs of any kind of machine? You would have to test every LRL machine in existence in order to rationally claim that none of them work. Even then you still have no real basis for claiming that no one could ever build such a machine. Please provide me with scientific data that will dispell my doubts. What makes you think that it couldn't ever be plausible under any circumstances?
While you are
technically correct, you're
practically wrong. I own around 50 LRLs, ranging from $25 to $10,000 (original price, not what I paid). No, I don't believe LRLs work, but I like to collect them, and show people what they really are. Every last one of them is an outright fraud. Let me clarify: it's not that they simply don't work, it's that they are a FRAUD. They are designed NOT TO WORK.
Obviously, I have not tested every LRL on Earth, so somewhere there might be an LRL that really works. But trying to find a non-fraudulent LRL is like trying to find a non-fraudulent Ponzi scheme. If an investment scheme is non-fraudulent, it is NEVER called a "Ponzi scheme." Likewise, if a locator actually works, it is never called an "LRL." LRLs are called LRLs because they are fraudulent. And after a 100% failure rate on every LRL I've ever seen, I can say with extreme confidence that "none of them work." In fact, I am so confident, I have a standing $25,000 offer to anyone who can demonstrate a working LRL. How's that for confidence?
Finally, in fair disclosure, I'm the Engineering Manager for a major metal detector company. A friend of mine, who happens to visit this forum occasionally, is the Chief Engineer of a competing major metal detector company. If LRLs had any more than a snowball's chance in hell of working, we'd be all over these things. We're not even interested.