Roughly speaking, a false string is one which does not have the same mass-per-length-unit across the entire vibrating length of the string. This can be due to uneven wear, but also be due to an accumulation of both internal and external contamination.
Why would you pay $22.00 for pre-carved corner blocks, if you are willing to carve them yourself (presuming that you have a job which pays more than ten bucks an hour?)
Several hundred or thousand years from now, archaeologists will dig up my gas-fired barbecue, and conclude that it was for the purpose of making burnt offerings to the gods.
Install a new string, and then get back to us.
There's no point in trying to diagnose problems when the strings are "false" from wear, or comtamination.
Would that absolve them (or their heirs) from responsibility for past real, presumed, or claimed misdeeds, unless some sort of statute of limitations has run out?