On Tue, 13 Nov 2018 at 07:45, Harold Hallikainen wrote: > It will be interesting to see what they find. "Dead man switches" have > been common in trains for a long time. It's interesting that the loss of > radio control did not shut down the train. > > I'll hazard that, having largely got trains right*, somebody added a laye= r that created an artificial "person" and that the train reacted correctly because the "person" continued to respond as a person should on the train side of its black box but it's brain, or sensory input system (aka radio link) had failed on the 'other side' of the black box, and the system analysis had failed to conclude that dead I/O should result in dead- person emulation. R __________________________________ * When: - *The French spend 50 million+ Euro *"shaving" 1300 station platforms because new trains are "too wide" - *100 people die when a carriage throws a wheel rim at 120 mph *("What's this thing protruding through the floor?") and is essentially ignored (and you haven't equipped passenger emergency stop signalling because it's too dangerous to give them that power in a train this fast) and then carriages get sideways and take out people mowing the embankment, and anything else within range. - You can make lists like *this .* then one may conclude that we have trains only "almost right". Russell --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .