The quiet after an argument can be repair beginning or communication giving up; the next action matters.

Silence after a row is genuinely ambiguous. It can be two people cooling down so they can speak better, or the moment one of them decides speaking is no longer worth it, and from outside these look identical. The quiet itself settles nothing. What follows it is what tells you which kind you were in.

If you are in that silence now, make the next move small and clear. Say when you will come back to it, or make tea, or name one thing you got wrong. Waiting to see who breaks first turns a pause into an answer nobody actually chose.