machines

Once when I was a kid the phone rang and I thought it was a machine, so I hung up. It wasn't, and he called back and asked to speak to my mother. I didn't get in trouble, but I have never forgotten. Now at work, whenever I get a phone call and I think it is a machine, even if I am like 95% positive( I will never again be 100% positive) it is a machine, I always always ask "is this a machine?" before hanging up. It always is, but I think I will always ask...just in case it isn't.