A childhood belief about technology

This one is about my sister. She is 22 and I am 20. Last year I started working at an office so I had access to all the cool office things like copiers and fax machines. My sister had never used a fax machine before since we never had access to one. One day she needed to fill out paper work for her job and send it to them. My mom suggested she fax it instead of sending it so she came to my work so I could fax it for her. Before I faxed it I mentioned that since it was an important document they might need the real copy. My sister looked at me blankly and said,

"Why won't they get the real copy."

That's when I realised that my sister was under the impression that a fax machine was like a transporter. I couldn't stop laughing as I explained to her how they really worked. I think she was dissapointed.