I remember being up in the attic, in between the trusses of a new build one miserable St. Louis summer, oh, about the year 2000 or 2001. We had to put blocking in above the "partition walls" to act as backing for drywall to attach to. I think it was a code thing where the drywall between the garage and the rest of the structure had go all the way up to the underside of the roof sheathing.
I had an "apprentice" down below on the ground floor cutting for me. I was trying to communicate with him to turn his speed square to say like a "five pitch".
All I got from him were looks like this:
So I climbed down once to show him.
Then I climbed back up there in that hot attic. "Okay, I need a tubb-a-four fifty six and a quarter inches, square to long point."
His reply was, "Uhh...how many tick marks is the first quarter?"
Me:

So for the better of that hot day, I just had him hand boards up to me, and I marked him out. Then I would hand them back down and he would cut them for me. He would hand them back up, and I would nail them on.
Sad.
Really.
Sad.