Your doubt is well founded, but assumes that words have meaning. In a society where 'literally' means 'figuratively' (with institutional backing), and opponents who engage in college debate level word twisting and teasing, permanent means whatever they want it to mean. Unless you can gather enough support/power to pin them down and agree on a definition, then show that agreement to the world, then bludgeon them with their own stupidity until they concede, there is no permanent but their permanent.

I'm not saying free helicopter rides may be needed to defend language against these bozos, but free helicopter rides.