On 22/03/2019 12:48, Tim Streater wrote:
In article , Jethro_uk
wrote:

On Fri, 22 Mar 2019 09:33:52 +0000, Brian Gaff wrote:

So if the security man does not know the code but all the external
people do, what would you think about the security of the building?

Most "security" is really theatre. However pointing it out immediately
makes you a suspect, so it's best to keep mum ....

As Richard Feynman pointed out in one of his books. During the war he
got a bit of a rep as a safebreaker largely because he could often
figure out what the safe's owner (often a bigwig general) or scientist
would set it to.

The generals usually left them at factory default, the scientists very
often to e or pi.

In the EMU unit for eledrely people with dementia that my mother died
in, the code to the rear entrance was given to every guest and written
on the wall of reception....

'They dont remember what it is even if they read it at the desk, so they
can't just wander off'


--
There is nothing a fleet of dispatchable nuclear power plants cannot do
that cannot be done worse and more expensively and with higher carbon
emissions and more adverse environmental impact by adding intermittent
renewable energy.