A fixed wheel counts as a brake, though I've only seen the law in relation to bicycles which require 2 working brakes not sure how this applied to unicycles.
The increasing prevalence of non-standard evaluation in R packages was one of the major reasons I switched from R to python for my work. The amount of ceremony and constant API changes just to have something as an argument in a function drove me mad.
If you've ever had to deal with the UK police as a victim of a crime, you'll quickly find out they're pretty useless at obtaining CCTV footage. I was asked to get it myself, to which the business who owned the CCTV told me they would only hand it to the police, so nothing happened.
I'm not sure which European country you're thinking about, but we had lockers, individual backpacks and heavy textbooks. I never used my locker because we didn't have enough time between lessons, so I just carried all my heavy textbooks for the day as did most people.
> And the ones who do care about reproducibility are using R anyway
I worked in a pharma company with lots of R code and this comment is bringing up some PTSD. One time we spent weeks trying to recreate an "environment" to reproduce a set of results. Try installing a specific version of a package, and all the dependencies it pulls in are the latest version, whether or not they are compatible. Nobody actually records the package versions they used.
The R community are only now realising that reproducible environments are a good thing, and not everybody simply wants the latest version of a package. Packrat was a disaster, renv is slightly better.