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Obviously its a gradient, but we can agree that "dedicate time and money" is on the action side and "typing online" being superfluous signaling. And yes, if you knew me in real life, you probably shouldn't weight my hacker news comments over what I spend time and money on.

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For what it's worth, I don't think it's so much a gradient. It's that everything is always both an action and a signal. Since signals can affect the behavior of others, all signals are actions. If an action is visible, it may convey something, so all (visible) actions are signals.

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