I did change your wording “physical means” to the more physics text correct “Mechanical means” and didn’t feel it was necessary to point it out to every one, but since you mention it.

Just to be sure I’m not misleading any one I am not a metallurgist by trade it was just one of the rungs on the academic ladder oh so many years ago.

For all of the rest of you that are reading along, I hope you are having as much fun as we are.
If you haven’t figured it out yet, I am arguing on the side of proper naming conventions and wanting to refer to things as to how they are used, and he is arguing on the side of the nature of things and wants to call a jack a jack, regardless of how many eyes are showing, and no mater whether it is in a bridge deck or a poker deck.

So here you have two guys that both love to play devils advocate and are probably both laughing while standing and sprinting for the line, I know I am.

Every discipline has it quirks and preferences and magnets do mostly stick to stuff made from ferrous metals except for, ta-dah Stainless steel.

The elite forces use survival knives that by specification are to be non magnetic so their options are stainless steel a poor choice and magnesium a really poor choice. I think mostly they chose mag because its so much lighter and they don’t care that it wont hold an edge because they never have to cut any thing with it.