When a person sends you a text message like "k" or "haha" & you cannot think of a reply. This is a conversation stopper, and like a rhetorical question, you do not need to give a reply, because who ever sent you this dumb text is not continuing the conversation, so neither should you.
Jim texts Lenny:
We're meeting at 6.
Lenny texts Jim:
wtf am i supposed to say to that, that is such a rhetexical.
Jim doesn't text Lenny back.