except of course when you consider proven to mean tested and not guaranteed.

( sleepybinky, Wed 15 Jun 2011, 10:57, archived)

Or you misread it as PR oven
and assume it's some sort of "think tank" for people in public relations.
In which case, some things are PR oven. PR ovens, for example.
( baldmonkey a frothy foul-smelling vaginal discharge, Wed 15 Jun 2011, 11:00, archived)

this is what I meant

( Two Hats 🎩🎩, Wed 15 Jun 2011, 11:07, archived)