Today's oddity: showed an actual degreed and employed #engineer how to use a cheap #Vernier #caliper to get accurate measurements down to 0.1mm.
Caveats: engineer is much younger than me, this was an old-school caliper without a dial or digital readout, their primarily field is fluid dynamics (so not a lot of calipers). And they understood the idea quickly.
But now I'm wondering this person would panic at the sight of a #slideRule. Tempting to throw one in the bag "just in case."