> A sailor is sailing her boat across the lake on a windy day. As the wind blows, she counters by turning the rudder in such a way so as to exactly offset the force of the wind. Back and forth she moves the rudder, yet the boat follows a straight line across the lake. A kindhearted yet naive person with no knowledge of wind or boats might look at this woman and say, “Someone get this sailor a new rudder! Hers is broken!” He thinks this because he cannot see any relationship between the movement of the rudder and the direction of the boat.
Indeed, causally linked variables need not be correlated in observed data; bias in the opposite direction of the causal effect may approximately equal or exceed it in magnitude and "mask" the correlation. Chapter 1 of this popular causal inference book demonstrates this with a few examples: https://mixtape.scunning.com/01-introduction#do-not-confuse-...
USPA has a tested division now and it's been gaining in popularity--it will soon be more popular than the untested division if it isn't already. Most of the top untested powerlifters have moved over to the WRPF (which does also have its own tested division). There are a lot of other smaller, regional, untested feds. Then there's the IPF and USAPL and their affiliates, which are fully tested, and are now far more popular than any of the untested feds. Untested might never go away, but tested has rapidly surpassed it in recent years.
Which is based not on your ability to produce value, but your ability to capture value and charge a cut of every unit, and is thus a massive disincentive to produce public goods.
When I lived in South Korea, one of the things that struck me was how much "flatter" the generations there were in terms of pop culture and music taste and awareness, compared to the US. I worked in an office with a bunch of suit-and-tie businessmen who were mostly in their 40s to 60s, and if you were to ask them about any current K-pop group, they all knew their hit songs.
My friend (who's the same age as me) has a 14 year old son who's learning guitar and he asked me for a lesson. The first thing he wanted me to show him was some riffs from AC/DC songs that came out before I was born.
I use plotnine whenever I need to make (static) plots in Python. It's really quite well done, a close match to R's ggplot2, and more feature complete than any of the other Python grammar of graphics packages I've tried.
I'm not sure I've even seen a recent, large C++ project that didn't depend on Python or some other external scripting language just to build it, so it's kind of hard to imagine using C++ itself to solve the problem that using C++ creates.
I worked with a guy in a C++ RPC team (think Envoy, but proprietary). He wrote the build tool that was used by our team, which maintained several fairly large C++ programs and libraries. He wrote it all in C++. He was of the opinion that most scripting tasks on the team could be accomplished with a small C++ program. It helped that we had a portable kitchen sink of libraries at our disposal, but he wasn't above using std::system to avoid the hassle.
https://mixtape.scunning.com/01-introduction#do-not-confuse-...