How do you tell clarity from impatience?

I think I need to let a loyal long-timer go; how do I know whether this is clarity or impatience?

Question 21 of the Index

You have been carrying this one for a while, and the reason you cannot move is not that you lack a fact. If a fact would settle it you would have gone and got the fact. It will not move because two very different states feel exactly the same from the inside: knowing, and being tired of not knowing.

Clarity and impatience produce the same sentence. Both say it is time. Both arrive with relief attached, and the relief is the part that fools people, because a decision that lightens you the moment you imagine making it has told you something about your appetite for the waiting rather than about the decision.

There is a way to separate them that does not require more thinking. Ask what would have to be true for the opposite choice to be right, and see how fast the answer comes. Clarity can describe the other side in detail and still choose. Impatience cannot be bothered to, and calls that decisiveness.

The other test is time-shaped. Clarity survives being asked to wait two more weeks. Impatience treats the two weeks as an insult. If the delay feels intolerable rather than merely inconvenient, the thing you are trying to end may be the discomfort rather than the situation.