Armrests

It isn't until your sister takes your chair away and you are forced to use her armrest-less chair that you begin to wonder if your chair had any.

Isn't it strange that I don't know something so basic about something I am in contact with every single day? I guess it's because I never encoded that information in my brain. I obviously received some sort of brain signal about it everyday because when I looked at the chair through my eyes, the retinal ganglion cells sent messages to the brain through the optic nerve.

What I mean is, I can't believe I don't know this piece of information. Don't sweat the little things right?