Very useful rules, I see… impossible to bypass :-)

Quite unusual, was it pure? As far as I know they always mix it with other nasty stuff beig it an excellent polar solvent

This is right. This requires a discussion a bit wider than 420 letters, even more when they come from Rowling

If only there was a solution, I don’t know, a cable resistent to jamming the ether, something we could call ether-jamming-resistant-network, in short Ethernet

I know… I am just dreaming :-P

Funghi

Sorry, but you are wrong, battery means exactly chemical battery

Gravity electrical storage is not a battery

https://en.wikipedia.org/wiki/Electric_battery?wprov=sfla1

Yep

And the picture from 1991 is in black and white?

GTFO

Edit: seems I was wrong in my assumptions

Well math might be, physics for sure isn’t

not yet

The same can be said for banknotes, they are quite useless as paper, they are mostly valuable because people see them as valuable and perceptions can change

Oh yes, that’s definitely how I also feel about them

Not disagreeing, but you are describing almost every company or corporation above a certain size