GreatAlbatross

While not strictly a QR code, I always liked that the Dolby Digital data between perforations on a film strip had a tiny Dolby logo at the centre.

https://en.wikipedia.org/wiki/Sound-on-film#/media/File:35mm_film_audio_macro.jpg

Finally, a local WEEE company gets to make a few hundred bucks selling off the glorified VOC sensors at the end.

Piston aircraft still use it. Which makes it doubly annoying when some tit in a cesna decides to circle around town at 1000’.
Not just making a noise, also cropdusting with TEL.

I sharpen my knives with a grit block maybe every 6 months, because I want sharp knives, but was told an angle sharpener would leave me with BBQ skewers.
It’s hardly a “masterful man task”, more like 20 minutes to do a kitchen chore. Like refilling the dishwasher salt. Or cleaning the bin.

I can hear Connor in this image saying “I hate that bro”

GCSE (14-16 year olds) history is (supposed to) teach the various types of source (primary, secondary, etc.), and consideration of reliability, bias, etc.

For the sciences, we were required to use reasonable sources (perhaps not direct papers and journals, but certainly reasonably reputable outlets that discuss their findings.

At college level (16-19), I honestly don’t remember this being a requirement (although I did drop history). Tests and assignments were mostly based on class teaching.

At university level, it goes full force after the first year. Everything you assert, you have to back up, using the university’s preferred referencing system.