Final answer:
Deleting an iMessage from your device doesn't automatically make it disappear from the other person's device.
Step-by-step explanation:
When you delete an iMessage from your device, it doesn't automatically disappear from the other person's device. However, if the other person hasn't read the message before you delete it, they will not be able to see it anymore.
If the other person has already read the iMessage before you delete it, then deleting it won't make it disappear from their device.
It's important to note that deleting a message only removes it from your own device and does not affect the other person's device.