A read receipt is a smoke detector, not a lie detector. It tells you an event happened, never what it meant, and confusing the two is the whole mistake.

What the detector actually reports

A read receipt reports one event: a small image in your message was fetched, once, from somewhere, at a certain time. That is the beep. It is real information and it is worth having, because before it you had nothing, only a message sent into silence. After it you know something occurred. But notice how narrow the report is, exactly as narrow as smoke in the air. It does not tell you who fetched it, whether they read a word, what they felt, whether they will reply, or what they decided. All of that is the fire, and the detector does not see fire. It sees smoke and says so.

The lie detector you wish you had

What people quietly want is a different machine. They want a device that reads the other person: did they really read it, did they understand, are they ignoring me, do they intend to answer, are they being honest about being busy. That machine would be a lie detector, an intent reader, and it does not exist, not in a read receipt and not anywhere. The trouble starts the moment you treat the smoke detector as if it were that machine. An open becomes "they read it and are ignoring me." A missing open becomes "they are avoiding me." A late open becomes "they were pretending to be away." None of those readings are in the data. They are stories you run through a device that only ever detects smoke.

Why the confusion is so easy

It is easy because the beep arrives attached to a person you care about, and a signal about something you are anxious over feels like it should carry the answer to the anxiety. A smoke detector in an empty warehouse produces curiosity. The same beep in your own kitchen at night produces a jump, because the stakes load meaning onto the sound. An open on a stranger's newsletter means nothing to you. An open on the email you are nervous about feels heavy with intent, and the heaviness is yours, not the signal's. The device did not change. Your need for it to say more did.

How to use a detector correctly

You use a smoke detector by letting it do its one job and then doing yours. The beep is a prompt to go look, not a verdict to act on blindly. Applied to a read receipt: an open is a prompt that the moment may be right to follow up, not a confession to interpret. A non-open is a prompt that the message may not have landed, not proof of a snub. You take the narrow fact the device gives you, and then you get the real answer the way you always could, by communicating with the person, which is the equivalent of walking into the kitchen to see what is actually going on. The detector points your attention. It was never going to make the decision for you.

The general shape

Every instrument belongs to a category, and it is trustworthy only inside that category. A detector tells you an event occurred. An interpreter would tell you what the event means, and most everyday instruments are detectors wearing no such interpreter inside them. The read receipt detects one event, an open, and reports it plainly. Ask it what the open means about the person and you have asked a smoke detector who set the fire. Keep the device in its category, treat the beep as a reason to look rather than an answer to trust, and a narrow honest signal stays useful instead of turning into a machine for manufacturing worry.

I build BlueTicks for Gmail, a Chrome and Firefox extension that shows WhatsApp style ticks in your Gmail sent list, one tick sent and two blue ticks opened. It is a detector, it tells you an open happened and when, and it does not pretend to read the person on the other end. It costs 4 dollars a year, and the free tier covers 30 emails a month. You can find it at blueticks.io.