On Jun 4, 6:19 pm, "porky_pig...@my-deja.com" <porky_pig...@my- deja.com> wrote: > I was walking this morning very early, still waking up, and as I was > passing through some construction zone, I saw the following sign: > > WATCH OUT FOR TURING VEHICLES > > Well, I said to myself, this might be those Turing machines created by > |-|erc as an attempt to prove that the the set of real numbers is > countable. Oh well ... Then I looked again. Alas, the sign actually > said: > > WATCH OUT FOR TURNING VEHICLES > > That's all, folks. > > PPJr.
The reason you have to be careful is because you can never tell whether or not it will halt.