Occasionally one speaks... of signals or signal chains. It should be noted that the word signal means the transmission of signs and hence concerns the very principle of causal order...
Hans Reichenbach
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Physically, we transmit signals or signs -- audible, visual, tactual. But the mere transmission and reception of a physical signal does not constitute communication. A sign, if it is perceived by the recipient, has the potential for selecting responses in him. Physically, when we communicate, we make noises with our mouths, or gesticulate, or exhibit some token or icon, and these physical signals set up a response behavior.
Colin Cherry
...introduce the auxiliary concept of first-signal...defined as the fastest message carrier between any two points in space. We now send a first-signal from P, calling the event of departure E1... The event of its arrival at P' is called E'. Simultaneously with the arrival of this signal, another first signal is sent from P'. The arrival of this signal at P is the event E2. ...the time interval between E1 and E2 is coordinated to the event E', [E1 is earlier than E' and E2 is later than E'] and every event of this time interval except for the endpoints is inderterminate as to the time order relative to E'.
Hans Reichenbach
...absolute time would exist in a causal structure for which the concept indeterminate as to time order lends to a unique simultaneity, i.e., for which there is no finite interval of time between the departure and return of a first-signal...
Hans Reichenbach
Organized religion, he saw, back in the day, had been purely a signal-to-noise proposition, at once the medium and the message, a one-channel universe. For Europe, that channel was Christian, and broadcasting from Rome, but nothing could be broadcast faster than a man could travel on horseback. There was a hierarchy in place, and a highly organized methodology of top-down signal dissemination, but the time lag enforced by tech-lack imposed a near-disastrous ratio, the noise of heresy constantly threatening to overwhelm the signal.
William Ford Gibson
May it be to the world, what I believe it will be, (to some parts sooner, to others later, but finally to all), the signal of arousing men to burst the chains under which monkish ignorance and superstition had persuaded them to bind themselves, and to assume the blessings and security of self-government.
Thomas Jefferson
Reichenbach, Hans
Reinfeldt, Fredrik
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