Also remember that each recipient of the signal will have their own reaction to it. What signals professional competence to one person can signal lickspittle corporate toadying to another.
replyYes, but in aggregate, most people (or most groups of people) will arrive at the same conclusion for the same signal.
replyElse signals and signalling wouldn't be a thing and people wouldn't care for them, their reception would be a random scatter plot.