Phone reception was not the issue in this case. They had printed the instructions and were working off paper copies. The issue was trusting the estimated journey time, which was waaaay off.
Erlang guarantees thread safety, doesn't it? At least, that's my understanding.
I think Ada does as well, but it's been a long time since I've used it and perhaps it requires certain coding constructs, rather than a general guarantee.
...says someone who doesn't understand the power and expressiveness of prototypal inheritance!
tbf It took me a while to grok it, but once you get it and start to use prototypal inheritance properly (instead of trying to fight it and force it to look like classic class-based inheritance) you'll find it a lot more rewarding.
You could read it as meaning "discovered something no one else has discovered before", but that's adding an extra layer of interpretation on top of the literal reading.