A few years ago, when building our garden shed, we were framing the rough opening for the double doors I had planned to install. I was getting ready to nail in the doubled 2x4 into place and my then son-in-law, who had zero experience in this sort of thing, was holding the level against the doubled 2x4.
“Let me know when that bubble is right in the middle.”
“Now do you want this square to the earth, or square to the shed?”
I wasn’t sure what to say.