Things people say without thinking

So, I’m soldering up this wiring harness for a new car stereo. Everything is going fairly well, when suddenly I run into a roadblock. I’m color-blind and could not distinguish the ‘gray’ and ‘gray/black’ pair of wires from the ‘green’ and ‘green/black’ pair on one of the harnesses. I scrutinized and squinted, I tried looking at them under a variety of light sources, all to no avail. Finally I go knock on my neighbor’s door, wiring harnesses in hand, explain my predicament, and ask which wires are which. She says to me “Are you really color-blind?” then points out the green and the gray wires for me.

Am I really color-blind? Why in God’s name would I make that up? When this topic comes up (which is infrequently, I try to keep it to myself) people invariably either:

A) Ask if I’m really color-blind.
B) Argue with me about it (”Oh, you are not!”)

I’m just thankful that my neighbor didn’t want to:

C) Play the “what color is this?” game.

That one really annoys the piss out of me.