Examples: - My brothers girlfriend can't tell the difference between standard definition and high definition on a 50" TV. - This girl I know had her surround sound speakers set to 2 channel and I changed them but she didn't notice any difference. - I was listening to Alice in Chains and my mom was asking me if they still play and I said "yeah but they changed their vocalist", the next track was Depeche Mode and she asked "is this their new singer?" and I had to explain to her it wasn't the same band, or even the same genre of music. Fuck, I want to punch a horse just thinking about it.