Hi... i am kind of new to this forum... so hi to all here... i have moved away from JW very recently... but then i was not in touch with them for very long...
I think this question of did God knew and if so why allow sin arises only because we have been taught to have this image of God as an all-knowing person... I believe that God can control history, much like how firgures of history like Napoleon or Alexander controlled and influenced history... him being God, he can do it much more effectively but i don't think he can predict individuals and their free will... God did not know Adam and others would sin... he must have been as surprised as anyone else when they did... when they did Sin, he improvised and laid out a plan for their redemption.... this does not paint God as the usual image we have in mind of an all-knowing person but paints him rather as someone like us human beings... which i believe he is... we were created in his image after all... but ofcourse he is infinitely powerful and hence he does decisively influence history...