My go to move at family dinners is just nodding along and changing the subject to pie, which works about as well as plugging a leak with a napkin. Last year I made the mistake of pointing out that my cousin's "gas prices under Trump" chart was missing a few years on the x axis, and I got called negative for the rest of the meal. The thing is, being right and being invited back for Christmas are two different hobbies. Your uncle hiding in the garage sounds like a win, but now you're the guy who ruined the mashed potatoes, so congrats on that. Facts are great until they cost you a dinner roll. Maybe next time just let him have the moon landing and save your phone for the football scores.

Been there with the shim mix up more times than I want to admit. Last summer I had a run of 12 oak drawers that fought me for two days because my .020 shims got dumped in the same coffee can as my .010s, and I never noticed until I was almost done. I even blamed the plywood for being out of whack, which was pretty dumb in hindsight. Now I keep them in separate ziploc bags with the thickness written on the outside in sharpie, though I still grab the wrong bag sometimes when I am rushed. The worst part is it never feels like a shim problem at first, you just keep chasing the gap around thinking the wall is bowed or your level is off. Six hours stings but at least you figured it out before the doors went on and the homeowner saw the mess.