Now I know what to do!
Hey, it could happen. If I were a SETI researcher, I’d just say the odds may be really low for any one lake, but we’ve got about 15,000 of them, so there could be one out there (that doesn’t sound very Bayesian, does it?).
Also, I guess I already knew what to do. I’ve done all 6 of the procedures mentioned, and there’s a couple I’m still doing.