Excellent question.
I've always wondered myself how the witnesses can really explain how every single individual on the planet could hear the "good news". Some have said "Jehovah will read the hearts". He will supposedly know if certain ones would take the good news if it were offered them, others have said they will all "somehow know". If armeggedons due at any time, then for Jehovah to "somehow make everyone know...he'd have to perform a miraculous feat as he did in the bible stories. I wonder how his presentation would sound.
:Jehovah. "Hi there, I was just in your neighborhood today and was asking people if they thought I'd ever step in and solve all the wordls problems we see so much of today"
Muslim: "Sadda hedre ombama canno e salvah ohem"
Jehovah: Hang on there, let me get out my little book that translates stuff that the Watchtower Bible and Tract Society puts out.....Hmmmm. Damn, I can't find it. How about I give you this book that will tell you our message for a small donation to support our work"
Muslim: "Sebamma mama" ...(which means, huh?)
Jehovah: *hands book to Muslim and waves goodbye*
Armageddon comes
Jehovah kills Muslim for using the little book for him and his family to use to wipe their asses with.
Gumobamma