Query about editing a deleted message

If I send somebody a message in 1 on 1 chat on WhatsApp and it is read then it receives two blue ticks.

If I edit it, it receives two grey ticks again. If the recipient deletes this message after reading it but before I edited it, will the messages remain with two grey ticks on my screen forever?

Therefore, if a message that I edited has two grey ticks in a conversation, but subsequent messages that I have sent have two blue ticks, can I necessarily conclude that this message has been deleted by the other party?

Thanks for your help!