When you send someone a message on Facebook then a check mark appears if they read your message.
If they didn’t read your message then it just shows an arrow.
The question is what causes the check mark to appear? Does it require clicking on the message box?
Is it possible to read a message from someone and not click on the box and have the arrow still be there?
I have sent a message to someone and I find it very hard to believe that they never read it but still only the arrow appears…