Imagine going back in time only 100 years and trying to explain to someone that you can hold all the world's knowledge on a little plastic gadget that you can h

Imagine going back in time only 100 years and trying to explain to someone that you can hold all the world's knowledge on a little plastic gadget that you can hold in your hand and that the gadget is also a camera that can shoot and play high definition videos. Most would say that is beyond absurd. I find it beyond absurd to speculate about what is or isn't possible when we know so little.