While pondering Tim in Bovey's curious findings regarding "Certified" Part 15 FM transmitters, in which every transmitter measured was either over or under the specific field strength seen in 15.239.
Since then we have assumed that the whole system of certification is not being seriously adherred to by either the manufacturers, the FCC, or both.
Preachers have issued once-an-hour reminders that the operator of these transmitters is the one responsible for actual compliance with 15.239, despite having no means of ascertaining that compliance and no appeal to the FCC nor manufacturers for their slapdash results.
Something doesn't make sense with this picture. A lot of somethings don't make sense.
That's why an evolutionary thinker, good morning, tends to believe there's an untold part of the story. He thinks the certifying labs have a different set of parameters, not simply the 15.239 rule, giving a certain margin of error in recognition of the loose tolerances of consumer level electronics manufacturing.
Makes sense, but this is human business which isn't bound to making sense.