Stop if the signal tells you to

 Begins: 18:00

 The first lesson from Chapter one of Eco’s book is recognising the difference between a signal and a sign.

 A signal is “a unit of a system that may be an expression system or a physical system without any semiotic purpose…A signal can be a stimulus that has no meaning but causes something…”

 A sign “is always an element of an expression plane conventionally correlated to one (or several) elements of a content plane”.

[OS not much understanding shown.  Bit of regurgitation perhaps?

SS Yes, but if there was a danger signal on a train track I’d know to stop, if there was a sign in a newspaper about why the train was going to stop, I’d be able to take an alternative route.

So, I have learned something]

 Ends: 6:15

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